Answer:
B
Explanation:
Homologous structures are shared structures that come from a common ancestor.
Structural similarities shared by two or more species that are based upon descent from a common ancestor are homologies. The answer is (b).
Structural similarities between two or more species that are based on descent from a common ancestor are called homologies. These similarities may be in the form of physical structures such as bones, organs, or body plans, or they may be genetic similarities at the molecular level.
Homologies provide evidence for the evolutionary relationships between species, as the presence of shared characteristics indicates a common ancestry. This can be contrasted with analogies, which are structural or functional similarities between species that are not based on a common ancestor but have evolved independently due to similar selective pressures.
Homologies can be used to reconstruct the evolutionary history of species and to classify them into related groups, while analogies can be misleading in determining evolutionary relationships. Hence, option (b) is correct.
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why do energy storage molecules need carbon
Answer:
Carbon is a key element in organic compounds, which are essential for life. Energy storage molecules like carbohydrates and lipids need carbon to store energy. Carbon is necessary to form many important molecules, including energy storage molecules, which are critical for life.
Explanation:
Answer:
This moves carbon from abiotic to biotic matter.
Explanation:
1. What is the % of glucose outside the cell?
2. What is the % of water outside the cell?
3. What is the % of water inside the cell?
4. Will osmosis occur?
5. If so, which way will water move (into or out of the cell)?
6. Will the cell swell or shrink?
7. The cell is in what type of solution (hypertonic, hypotonic, isotonic)?
Osmosis is the simple passive transport through which water moves through a semipermeable membrane when solutions at bot sides show a difference in solute concentration. 1. 10%. 2. 90%. 3. 80%. 4. Yes. 6. swell. 7. hypertonic
What is osmosis?
Osmosis is the simple passive transport of water molecules that occurs when two dilutions of different concentrations are separated by a semipermeable membrane.
The membrane allows the pass of water but not solute. Hence, water can move from the most diluted side (higher water potential) to the less diluted one (lower water potential).
Let us remember that the water potential is the potential energy in a mass of water. Among other factors, it depends on solute concentration,
Most diluted side ⇒ higher water potentialMost concentrated side ⇒ lower water potentialConcerning solute concentrations,
the hypertonic solution is the one with the highest solute concentrationthe hypotonic solution is the one with less solute concentration. The most diluted one. isotonic solutions are those with equal solute concentrations.1. What is the % of glucose outside the cell? 10%
2. What is the % of water outside the cell? 90%
3. What is the % of water inside the cell? 80%
4. Will osmosis occur? Yes, because there is a difference in solute and water concentration.
5. If so, which way will water move (into or out of the cell)? Into the cell.
6. Will the cell swell or shrink? the cell will swell because water in goin in.
7. The cell is in what type of solution (hypertonic, hypotonic, isotonic)? hypertonic, because solute concnetration is higher in the cell thann outside.
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Achondroplasia, a form of dwarfism, is inherited as a dominant
condition (a). what is the probability of two heterozygous dwarfs
having normal height children?
The probability of two heterozygous dwarf parents having normal height children is 25%. This is because Achondroplasia is a dominant condition and is caused by a mutation in the FGFR3 gene.
This mutation causes a faulty form of the protein to be produced, which causes the dwarf phenotype.
When two heterozygous (carriers of the mutant form of the gene) parents have a child, there is a 25% chance that the child will inherit two copies of the mutant gene and will be a dwarf, a 50% chance that the child will inherit one copy of the mutant gene and be a carrier, and a 25% chance that the child will inherit two copies of the normal gene and have normal height.
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Your colleague designed a common garden experiment to determine if desiccation (drying out) influences competition between a native alga and an exotic alga. The design includes four plot types: dry with native only, dry with exotic only, dry with both algae, and wet with both algae.
When grown together on dry plots, the native grew well while the exotic went extinct. When grown together on wet plots, the exotic grew well while the native went extinct. Both algae grew in dry plots when grown alone. You note that his experimental design is incomplete and, as a result, he cannot support one of the following conclusions. Which conclusion is NOT supported?
a. Dry habitats are part of the fundamental niche of the native alga.
b. Dry habitats are part of the fundamental niche of the exotic alga.
c. The native alga competitively excludes the exotic alga in dry habitats.
d. The exotic alga competitively excludes the native alga in wet habitats
Based on the experiment design, it appears that your colleague is interested in investigating the role of desiccation on the competition between The correct option is d. The exotic alga competitively excludes the native alga in wet habitats.
The design includes four plot types, including dry with native only, dry with exotic only, dry with both algae, and wet with both algae.
It is important to note that dry habitats are part of the fundamental niche of the exotic alga, indicating that this species is adapted to survive in conditions where water availability may be limited. This suggests that the exotic alga may have a competitive advantage over the native alga in dry habitats, as it is better equipped to handle desiccation stress.
Additionally, the fact that the exotic alga competitively excludes the native alga in wet habitats further supports the idea that the exotic alga may have a competitive advantage overall. This could be due to a variety of factors, including differences in resource use efficiency or ability to tolerate environmental stressors.
Overall, this experiment has the potential to provide valuable insights into the mechanisms driving competition between native and exotic species in different environmental contexts. By understanding how these factors interact, researchers can develop strategies to mitigate the negative impacts of invasive species and promote the persistence of native biodiversity.
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Choose the option that best describes nucleotide pairing in dna.
*
To best describe nucleotide pairing in DNA, we can say that it follows the complementary base pairing rule, where Adenine (A) pairs with Thymine (T) and Cytosine (C) pairs with Guanine (G). This specific pairing is due to hydrogen bonding between the nucleotides, ensuring the stability and accurate replication of the DNA molecule.
The two strands are held together by the hydrogen bonds between the nitrogenous bases of the DNA nucleotides. Generally, purines pair with pyrimidines. Thus, adenine forms two hydrogen bonds with thymine while cytosine forms three hydrogen bonds with guanine. A base pair is two chemical bases bonded to one another forming a "rung of the DNA ladder." The DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.
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Looking ahead at potential inheritance
barati and her dark-skinned husband if he had no albinism in his family
mother’s genotype:
father’s genotype:
offspring genotype %:
offspring phenotype %:
If Barati and her dark-skinned husband did not have any albinism in his family, then their offspring would likely have a genotype that is a combination of both the mother and father's genotype.
This could mean that their children may have a mix of the two parents' traits, or they may have traits that are completely unique to them. The percentage of their offspring's genotype would depend on the combination of the mother and father's genotypes.
The phenotype of the offspring would be determined by the genes they possess and how they interact with the environment. For example, if the mother and father both have dark skin, then the offspring would likely have dark skin as well. However, if the parents have different shades of skin color, then the offspring could have skin that is a mix of the two.
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During crossing over, _______ pairs exchange pieces, so that each sibling has a different combination of ____________
During crossing over, homologous pairs exchange pieces, so that each sibling has a different combination of genetic material.
This process is an important part of the diversity of living organisms. It occurs during meiosis, when homologous chromosomes exchange pieces of their genetic material, resulting in new combinations of alleles. This process is random, meaning that each time a pair of homologous chromosomes cross over, the resulting offspring have a different combination of alleles.
Crossing over is an important process for the evolution of species, as it allows for the variation of genetic traits among siblings. It also helps to increase genetic diversity within a population, which increases the chances of successful adaptations to changing environments.
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storm drains are connected by ____ to the outlet where the water goes into the river.
Answer:
Street gutters is the answer
Giant viruses are challenging the historical notion that viruses are nonliving things. What characteristic do giant viruses possess that make scientists think twice about their classification?
Giant viruses possess characteristics such as large genome size, complex structure, and the ability to perform certain metabolic functions that make scientists reconsider the traditional classification of viruses as nonliving things.
Traditionally, viruses are considered nonliving entities because they lack the necessary machinery to replicate and metabolize on their own, and instead rely on host cells to carry out these functions.
However, giant viruses challenge this notion because they possess genes that allow them to perform certain metabolic functions on their own, such as the ability to synthesize proteins and produce ATP.
Additionally, giant viruses have much larger genome sizes compared to typical viruses, with some exceeding the size of small bacteria. Their complex structures also resemble those of some bacteria, with internal membranes and even organelles such as nuclei.
These characteristics have led some scientists to propose that giant viruses may represent a fourth domain of life, alongside bacteria, archaea, and eukaryotes.
Others argue that they may simply represent an extreme form of virus evolution. Regardless of their ultimate classification, the discovery of giant viruses has sparked new questions and challenges to our understanding of what constitutes life.
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1. Based on the model shown, what organisms should have the smallest population numbers in an ecosystem?
2. Based on the model, why is the producer level the largest level?
Why the lynx and hares
populations are out of phase
The lynx and hare populations are out of phase due to the presence of time lags in their population cycles.
The interaction between these two species is an example of a predator-prey relationship, where the lynx is the predator and the hare is the prey. The hare population increases due to the availability of food and resources, which in turn supports the growth of the lynx population.
However, as the lynx population increases, they consume a greater number of hares, causing the hare population to decline. With the decline in the hare population, the lynx population also begins to decrease due to lack of prey.
However, this decline in lynx population allows the hare population to recover, and the cycle begins anew. The time lag occurs because the population of the predator (lynx) responds to changes in the population of its prey (hare) with a delay due to factors such as reproduction and migration. This lag results in the out-of-phase nature of the populations.
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A couple has two children with a genetic disease. what is the probability that the next child will have the same genetic disease
The probability of the next child having the same genetic disease depends on the inheritance pattern of the specific disease. If both parents carry a genetic mutation that causes a specific disease, then there is a chance that their children will inherit the same mutation and develop the same disease.
If the genetic disease is caused by a recessive mutation, then the probability of the next child having the same disease is 25% (1 in 4). This is because each parent carries one mutated copy of the gene but does not show any symptoms of the disease. When they have children, each child has a 25% chance of inheriting two copies of the mutated gene, one from each parent, and thus developing the disease.
If the genetic disease is caused by a dominant mutation, then the probability of the next child having the same disease is 50% (1 in 2). This is because only one copy of the mutated gene is needed to cause the disease, and each child has a 50% chance of inheriting the mutated gene from the affected parent.
It is important to note that these probabilities are not exact and can vary depending on other factors such as genetic testing and family history. Consultation with a genetic counselor can help provide more personalized information and guidance for families dealing with genetic diseases.
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If you have 1 million base pairs of random dna and you have an enzyme that cuts at the sequence agatct, how many enzymes sites would you predict to find within the 1 million bases?
To find around 244 enzyme sites within the 1 million base pairs of random DNA for the enzyme that cuts at the sequence "AGATCT."
To predict the number of enzyme sites within the 1 million base pairs of random DNA, we need to consider the probability of finding the specific sequence "AGATCT" that the enzyme cuts at.
Step 1: Determine the probability of finding each base in the sequence.
Since there are 4 bases (A, T, C, G), the probability of finding each base at any given position is 1/4 or 0.25.
Step 2: Calculate the probability of finding the entire sequence.
The probability of finding "AGATCT" is (1/4)× (1/4)× (1/4) ×(1/4) × (1/4) ×(1/4) = (1/4)^6 = 1/4096.
Step 3: Predict the number of enzyme sites.
To find the number of enzyme sites, multiply the probability of finding the sequence by the total number of base pairs in the DNA: 1,000,000 base pairs ×(1/4096) = approximately 244 enzyme sites.
So, you would predict to find around 244 enzyme sites within the 1 million base pairs of random DNA for the enzyme that cuts at the sequence "AGATCT."
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Plankton are small organisms, often microscopic, found in the ocean. Phytoplankton are a type of plankton made up of microscopic plants. Where in the ocean would you expect to find phytoplankton?
Phytoplankton are most abundant in areas of the ocean where there is enough sunlight and nutrients for photosynthesis, typically found in the upper layers of the ocean.
The distribution of phytoplankton in the ocean is not uniform and can vary depending on a range of factors such as ocean currents, temperature, and nutrient availability. In general, areas with high levels of nutrients, such as upwelling zones or near river mouths, tend to have higher levels of phytoplankton.
These areas are often characterized by high productivity, meaning they support a lot of life and can be important feeding grounds for larger marine animals. The abundance and distribution of phytoplankton in the ocean are important for understanding the functioning of marine ecosystems and the global carbon cycle.
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Which of the statements most likely describes an example of chemical weathering.
A.
the widening of cracks in rock by tree roots
B.
the rusting of iron rich rocks
C.
the expansion and contraction of rocks as tempertures change
D.
the scouring of rocks by windblown sand
B. The rusting of iron-rich rocks most likely describes an example of chemical weathering is correct because:
Chemical weathering involves chemical reactions that break down rocks and minerals, and the rusting of iron-rich rocks is a type of chemical reaction that can cause the rock to break down and weaken over time. This is because chemical weathering involves the alteration of rock material through chemical reactions, such as oxidation, which leads to the rusting of iron-rich rocks. For instance, carbon dioxide from the air or soil sometimes combines with water in a process called carbonation. This produces a weak acid, called carbonic acid, that can dissolve rock.
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(T/F) males produce gametes continuously while females are born with all of the gametes that they will ever have.
Answer:
Explanation:
False.
Males and females both produce gametes continuously, but the processes by which they do so are different. In males, the production of sperm occurs continuously throughout their reproductive lives, with millions of new sperm being produced every day through a process called spermatogenesis. In females, on the other hand, all of the eggs that a woman will ever have are produced before she is born and are stored in her ovaries until they are released during ovulation.
While the number of eggs that a woman has is determined at birth, the quality and health of those eggs can be influenced by various factors throughout her life, such as age, nutrition, and exposure to environmental toxins.
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The given statement "Males produce gametes continuously while females are born with all of the gametes that they will ever have." is False.
Males and females have different gamete production processes. In males, gametes (sperm) are continuously produced from puberty until late in life.
In contrast, females are born with a finite number of gametes (eggs) in their ovaries, which are released periodically throughout their reproductive years.
At birth, a female baby has about 1-2 million eggs in her ovaries. However, by the time she reaches puberty, only about 300,000-500,000 eggs remain, and only 300-400 will ever be released during ovulation.
This means that female gametes are not produced continuously, but rather during fetal development and early life stages.
Therefore, the statement "males produce gametes continuously while females are born with all of the gametes that they will ever have" is not entirely accurate, as it oversimplifies the gamete production process in both sexes.
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Which idea about déjà vu does the title of the selection support?
A. Déjà vu usually happens spontaneously.
B Researchers are eager to learn more about déjà vu.
C A person experiencing déjà vu may feel momentarily confused.
D People who experience déjà vu ask many questions
The title of this selection, "Questions About Déjà Vu," supports idea B, that researchers are eager to learn more about déjà vu.
Here, correct option is B.
Déjà vu is an experience of feeling as if one has already witnessed or experienced a current situation. It is believed to be caused by a misfiring of neurons in the brain, but the exact causes are still unknown. Researchers are eager to learn more about what causes this phenomenon and why it happens.
They are also interested in the effects it has on people who experience it, such as confusion and uncertainty, or even a sense of familiarity. By studying these effects, they hope to gain insight into the workings of the human mind and its relationship to memory.
Therefore, correct option is B.
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Some plants reproduce asexually by sending out an underground stem called a rhizome. At the growing end of the underground stem, roots appear and a shoot forms that will become a new plant. Compare the traits of the new plant with the parent plant. Explain your answer
The new plant produced by asexual reproduction through a rhizome will be genetically identical to the parent plant.
This is because asexual reproduction does not involve the fusion of gametes or the mixing of genetic material from two parents. Instead, the new plant grows from a part of the parent plant, with the same genetic information. Therefore, the traits of the new plant will be identical to those of the parent plant, including its physical characteristics, growth habits, and any traits that are determined by its genes.
This type of asexual reproduction is commonly seen in plants such as bamboo, ginger, and mint, which can spread rapidly through the growth of rhizomes. While asexual reproduction may limit genetic diversity.
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The drawing below shows a snapshot of a wave what does the measurement labeled E equal 
E measures the amplitude of the wave, which is the maximum displacement of the wave from its equilibrium position.
The measurement labeled E on the snapshot of a wave represents the amplitude of the wave.
Amplitude is defined as the maximum displacement of the wave from its equilibrium position.
In other words, E measures the distance between the crest or peak of the wave and its equilibrium position.
The larger the amplitude, the more energy the wave carries.
The amplitude of a wave can be affected by factors such as the energy of the source that produced the wave, the distance the wave has traveled, and the medium through which the wave is traveling.
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Which tissue type forms binding,
supporting, and transporting structures
and usually contains collagen for
strength?
A. Epithelial tissue
B. Muscular tissue
C. Connective tissue
D. Nervous tissue
The tissue type that forms binding, supporting, and transporting structures and usually contains collagen for strength is Connective tissue. Thus option C is correct answer.
Connective tissue is a type of tissue that provides support as well as structure to the body. It is responsible for forming the binding, supporting, and transporting structures of the body. Connective tissue is composed of cells and an extracellular matrix, which contains collagen, elastin, and other fibers that give it strength and flexibility.
Collagen is the most important protein in connective tissue and is responsible for its strength. It provides a scaffold for other proteins and cells to attach to and gives the tissue its structure. Connective tissue can be found in various forms throughout the body, such as tendons, ligaments, cartilage, bone, and blood.
Unlike epithelial tissue, which covers and lines body surfaces and organs, connective tissue is found throughout the body and performs a variety of functions. It is responsible for connecting and supporting tissues and organs, providing protection and insulation, and transporting nutrients and waste products throughout the body.
In summary, the connective tissue is the tissue type that forms binding, supporting, and transporting structures in the body and contains collagen for strength. It is a diverse tissue type that is essential for maintaining the structure and function of the body.
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B) Why would a fast-growing weed more quickly evolve a resistance to toxic chemicals than a slow- growing tree? (3 points)
A fast-growing weed will evolve a resistance to toxic chemicals more quickly than a slow-growing tree because of the differences in their respective lifespans.
The shorter life span of a weed means that it undergoes more generations over a given period of time than a tree. This allows it to accumulate more genetic mutations, some of which may be beneficial in allowing it to survive in a toxic environment.
With each generation, the beneficial mutations are passed down to the next generation and are more likely to become more entrenched in the population of the weed. In addition, since weeds reproduce rapidly, any resistance that is acquired can spread quickly in the population, allowing it to outcompete other species and survive in a toxic environment.
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What is the temperature of our photosphere?
Answer:
5,500 degrees Celsius (9,932 degrees Fahrenheit or 5,773 Kelvin).
Explanation:
In the human body, the circulatory system transports and delivers substances. Within the cell, which organelle performs a similar function?.
Answer:
Endoplasmic reticulum.
Explanation:
In the human body, the circulatory system transports and delivers substances. Within the cell, the endoplasmic reticulum performs a similar function.
how many types of rocks can form from the rock cycle?3 kinds2 kinds1 kinds4 kinds
Answer:
3 kinds.
Explanation:
3 kinds of rocks can form from the rock cycle. The three kinds of rocks are igneous, sedimentary, and metamorphic.
There are three types of rocks that can form from the rock cycle: igneous, sedimentary, and metamorphic.
The rock cycle is the process by which rocks are continuously transformed between these three types.
Igneous rocks are formed from the cooling and solidification of magma or lava.
Sedimentary rocks are formed from the accumulation and cementation of rock fragments, mineral crystals, or organic material.
Metamorphic rocks are formed from the alteration of pre-existing rocks by heat, pressure, or chemical activity.
The rock cycle is a continuous process that can take millions of years to complete. Rocks can undergo changes due to physical, chemical, and biological processes, and can transform from one type to another.
The type of rock that forms from the rock cycle is determined by the environmental conditions that the rock is exposed to, such as temperature, pressure, and chemical activity.
The rock cycle is an important concept in geology, as it helps to explain how rocks are formed and the processes that shape the Earth's surface.
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b
1. why does a student that lives in grand rapids experience much more snowfall than a student
that lives in detrolt?
The amount of snowfall a particular area receives depends on a variety of factors such as its geographical location, elevation, and proximity to large bodies of water.
Grand Rapids is located in the western part of Michigan, which is known to receive more snowfall than the eastern part, where Detroit is located. This is because of the lake-effect snow phenomenon, which occurs when cold air moves over the relatively warmer waters of Lake Michigan. The moisture from the lake evaporates and rises into the atmosphere, where it condenses and forms snow clouds.
These clouds then release snow as they move over the land, resulting in heavy snowfall in areas close to the lake. Grand Rapids is situated closer to Lake Michigan than Detroit, and therefore experiences more snowfall as compared to Detroit, which is farther away from the lake. Additionally, the elevation of Grand Rapids is higher than that of Detroit, which can also contribute to higher snowfall amounts.
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Stimulation of the reticular formation will cause a:.
The reticular formation is a network of nuclei and fibers located in the brainstem that plays a crucial role in regulating consciousness and arousal. Stimulation of the reticular formation can have various effects depending on the specific region stimulated and the individual's current state.
In the case of a sleeping cat, stimulation of the reticular formation can cause the cat to awaken, as this area is responsible for maintaining consciousness and alertness. The reticular formation is also involved in regulating appetite and thirst, so stimulation of this area can affect these behaviors as well.
However, it is important to note that the effects of reticular formation stimulation are complex and depend on several factors, including the specific location of the stimulation and the individual's current physiological state.
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Complete question :
Stimulation of the reticular formation will cause a
A. sleeping cat to awaken
B. hungry cat to stop eating
C. violent cat to become passive
D. thirsty cat to drink
in a salt solution, why is water the solvent and salt the solute?
Answer: Water is the solvent because it is the product that the solute, in this case, salt, would be added. Vise-versa. Salt is the dissolving component entering the water.
marya plans to participate in a 20 km walk-a-thon. to prepare, she walked 4 km on monday. she plans to increase her walk by 2 km each week until she reaches 20 km.
Marya will indeed reach her goal after 8 weeks, as planned.
Marya plans to participate in a 20 km walk-a-thon, and to prepare for it, she walked 4 km on Monday. She plans to increase her walk by 2 km each week until she reaches 20 km.
To find out how many weeks it will take Marya to reach her goal, we can set up an equation:
4 + 2x = 20
where x is the number of weeks it will take her to reach 20 km.
We can then solve for x by subtracting 4 from both sides and dividing by 2:
2x = 16
x = 8
Therefore, it will take Marya 8 weeks to reach her goal of 20 km. To check this answer, we can plug in x = 8 into the equation and see if it makes sense:
4 + 2(8) = 20
20 = 20
This confirms that Marya will indeed reach her goal after 8 weeks, as planned.
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What could have caused the size of the moon jelly population to increase?
Claim 1: A change to the size of the algae population caused the jelly population to increase.
Claim 2: A change to the size of the walleye pollock population caused the jelly population to increase.
1-State your claim. You can support one or both claims.
2-Describe your evidence.
3-Make your argument as convincing as possible by making sure you explain how your evidence supports your claim or claims
I believe both claims are valid, as a change in the size of the algae and walleye pollock populations could have caused an increase in the size of the moon jelly population.
The evidence to support this is that moon jellies feed on both algae and walleye pollock, so an increase in the size of these populations could have provided an increased food source for the moon jelly population.
Furthermore, as both algae and walleye pollock are abundant in the ocean, an increase in the availability of these food sources could have enabled the moon jelly population to grow larger.
In addition, moon jellies have a relatively short lifespan, which means that any increase in the availability of food sources could have increased the number of jellies that were able to survive and reproduce.
Therefore, an increase in the size of the algae or walleye pollock populations could have created an ideal environment for the moon jelly population to thrive.
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Which of the following would best explain the differences between closely related species found on
each of the four landmasses.
A. hybridization
B. temporal isolation
C. behavioral isolation
D. geographic isolation
Answer: D. Geographic isolation would best explain the differences between closely related species found on each of the four landmasses.
Geographic isolation occurs when physical barriers, such as mountains or oceans, prevent populations of a species from interbreeding with one another. Over time, these populations can diverge in their traits and genetic makeup, leading to the evolution of distinct species.
In this scenario, the closely related species found on each of the four landmasses would have evolved independently from one another due to their geographic isolation. As a result, they may exhibit differences in their physical characteristics, behavior, and genetics that have accumulated over time due to natural selection, genetic drift, and mutation.
Hybridization, temporal isolation, and behavioral isolation can also contribute to speciation, but they would not be the best explanation for the differences between closely related species found on different landmasses. Hybridization, for example, would result in the fusion of populations and the breakdown of reproductive barriers, leading to the formation of a hybrid population rather than distinct species. Temporal isolation and behavioral isolation, on the other hand, would prevent interbreeding between populations that occupy the same geographic area, but they would not explain why closely related species found on different landmasses have evolved to be different from one another.
Explanation:
