Environmental factors can influence natural selection because they can increase or decrease and what can they increase or decrease in the amount of genetic variation in a population.
What is natural selection?Populations of living things adapt and change through a process called natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways. Because of this variety, some people have characteristics that suit their surroundings more than others.
Four requirements must be met for natural selection to take place: reproduction, inheritance, variety in physical traits, and variation in the number of children produced by each person.
Reproduction:
A population must procreate to produce a new generation in order for natural selection to affect it. Over many generations, people who have the characteristics that are most compatible with their environment tend to breed more than people who don't.
Heredity:
Since the genes of the parents combine to form the DNA of their offspring, heredity and reproduction go hand in hand. Natural selection must operate if parents with favourable qualities pass those traits on to their kids.
Variation in Characteristics:
Only when individuals within a community differ in their personal features can natural selection take place. For instance, different people must have varied colors in order to research natural selection on color within a population. There wouldn't be any traits for nature to "select" over others in the absence of variety in traits.
Fitness Variation:
Compared to its popular notion, fitness has a more technical meaning. Fitness in the context of evolution refers to an organism's capacity for maximum survival and reproduction. Natural selection cannot take place in a population unless its individuals have varying levels of fitness. Some people must have characteristics that make it easier for them to survive and procreate more frequently than others. Otherwise, natural selection cannot act to increase the number of people with advantageous features and decrease the number of people with undesirable qualities.
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In a certain population of rabbits, the allele for brown fur is dominant over the
allele for white fur. If 20 out of 100 rabbits have white fur, what is the allele
frequency for the dominant allele?
Which statement is correct?
O Theories are accepted as true when a single experiment yields similar results to another one.
O When a scientist finds a new way to test a hypothesis, experimental methods do not change.
O Theories may be revised over time as information is discovered or technology is developed.
O When a scientist finds a new way to test a hypothesis, the original theory is made into a law.
Answer:
Theories may be revised over time as information is discovered or technology is developed.
Explanation:
A scientific theory is a term used when a statement tries to explain a natural phenomenon of nature based on scientific facts. In short, a theory is the representation of a set of hypotheses that was confirmed through an experiment and that tries to explain a phenomenon, but leaves room for revisions and updates to its explanation.
For this reason, we can say that theories are reformulated, revised and even discredited, when the advancement of scientific knowledge and technology allows the creation of new studies that show a different explanation and more consistent with reality.
Answer:C
Explanation:
___________ synthesizes carbohydrates and puts finishing touches on proteins synthesized at
The Golgi complex synthesizes carbohydrates and puts finishing touches on proteins synthesized at rough endoplasmic reticulum.
What is cell organelles?The cell organelles are the membrane bound structures found within the cells which has different specific functions.
Example of cell organelles include:
Golgi complex: These organelles specializes in protein modification and exportation.Endoplasmic reticulum: These organelles are specialized for protein production for export out of the cell.Learn more about cell here:
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What was the background information that Schleiden and Schwann
needed to perform their experiments about cells?
Theodore Schwann and Mattias Schleiden needed the background information about cell is that how cells originate and functions in the body of animals as well as plants.
What is the contribution of Schwann and Schleiden?Schwann and Schleiden proposed the cell theory, which states that all living organisms are composed of one or more cells. The cell is the basic unit of structure and function in organisms.
Each cell arises from a pre-existing cell.
The basic information that Schwann and Schleiden needed before performing the experiments about cells is how cell-derived in this nature become the most important part of life in living entities.
They also wanted to know the actual function and metabolic activities of the cell.
Therefore, it is well described above.
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Why do scientists refer to inputs and outputs of carbon in the environment as a cycle?
Answer:
Carbon flows between each reservoir in an exchange called the carbon cycle, which has slow and fast components. Any change in the cycle that shifts carbon out of one reservoir puts more carbon in the other reservoirs. Changes that put carbon gases into the atmosphere result in warmer temperatures on Earth
Explanation:
hope this answer helps you
It is important for the scientists to refer to inputs and outputs of carbon in the environment as a cycle as carbon continuously flows through these systems in the environment and it is a major biogeochemical cycle.
What is Carbon cycle?Carbon cycle is a major biogeochemical cycle. It involves the flow of Carbon between each reservoir present in the environment in an exchange, which has both slow and fast components. Any change in the carbon cycle shifts carbon out of one reservoir and puts more carbon into the other reservoirs. Changes that put carbon gases into the atmosphere results into warmer temperatures on planet Earth.
Carbon flows into stores that are called inputs, e.g. carbon dioxide added to the atmosphere by human activities such as respiration and pollution. Flows leaving stores are outputs, e.g. dissolved carbon carried from the land in solution by the rivers.
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Help me ye good people so that I may give brain something
Answer:
K
Explanation:
without having equal balance the ecosystem would collapse
what is an accurate description of an ecosystem
Answer:
An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact.
Explanation:
Hope it Helps!!!
Please help!!! Thank you!!!!
Answer:
natural selection ; homologous
The population of birds with large beaks will increase on the island (1st listed) ; The trait for large beaks will be passed on to future generations through natural selection. (3rd listed)
B) 80 /200
Explanation:
Giraffes evolved over many generations to have long necks. Giraffes that had longer necks were more likely to survive than giraffes with shorter necks because they had better access to food. This is an example of natural selection / survival of the fittest.
(the "fittest" [most beneficial/practical] trait is surviving and getting "selected" by nature)
Giraffes are also vertebrates, like humans. In fact, despite their different neck sizes, humans and giraffes have exactly seven vertebrae bones in their neck. This similarity suggests human and giraffe necks are homologous [structures]
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...' What are two ways the decrease in seed availability will affect the population of birds on the island?'
The population of birds with large beaks will increase on the island.
[This is the concept of natural selection / survival of the fittest, they have the most abundant resource [because they are able to eat what is abundant on the island, compared to smaller birds that have a larger decrease in food availability] ]
The trait for large beaks will be passed on to future generations through natural selection.
[If these birds / and this trait survive, they will be able to have offspring [future generations]. Birds with a low survival percentage will be less successful in mating, and will likely not produce the same quantity of offspring that will carry on their traits to future generations.]
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frequency of an allele:
population: 100
frequency recessive [homozygous bc 2 same recessive alleles]: 25 (tt)
frequency dominant homozygous: 45 (TT)
frequency heterozygous dominant: 30 (Tt)
total alleles: 100 [our population] times 2
100 · 2 = 200
total alleles: 200
number of times we have [dominant] T:
30 from each heterozygous dominant (Tt)
2 · 45 (TT has two T's) = 90 from homozygous dominant
30 + 90 = 120
number of times we have [recessive] t :
30 from each heterozygous dominant (Tt)
2 · 25 (tt has two t's) = 50 from each homozygous recessive
30 + 50 = 80
So, we know that the frequency of recessive allele [t] is 80 / 200
[80 out of 200]
So, option B) 80 / 200 is correct
(this = 0.4)
(and dominant [T] is 120 / 200; I say this to show that recessive frequency and dominant frequency are calculated the same way!!)
(this = 0.6)
hope this helps!! (this took me a long time to write so please do read it thoroughly!!)
Answer:
your answer was so worth waiting!!!!!
Explanation:
If the elephants, just because of their size, are the only large animals that can get to the water to drink, the zebras may suffer. This is an example of ______?
A) Competition between habitats
B) Competition between species
C) Breakdown of ecosystems
D) overlap of population
If the elephants, just because of their size, are the only large animals that can get to the water to drink, the zebras may suffer. This is an example of Competition between species.
What is species competition?Competition is an ecological relationship that occurs between organisms of the same or different species. We say that competition is intraspecific when individuals of the same species are involved, and that it is interspecific when dealing with different species.
Interspecific competition is an interaction between two species that causes damage to one or both of them. In general, competition can be for resources such as: space, food or nutrients, light, organic waste, among others.
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Indicate the relationship between the two items listed in each situation: (can be used more than once or not at all) - A. Resting neuron's permeability to K B. Resting neuron's permeability to Na - A. Neuron's permeability to Na during the rising phase of an action potential B. Neuron's permeability to K during the rising phase of an action potential - A. Resting neuron's permeability to Na B. Neuron's permeability to Na during the rising phase of an action potential - A. Resting neuron's permeability to K B. Neuron's permeability to K during the falling phase of an action potential - A. Neuron's permeability to Na during the falling phase of an action potential B. Neuron's permeability to K during the falling phase of an action potential a. A and B are equal. b. A is greater than B. c. B is greater than A.
The permeability of the neuron membrane to Na and K differs with the stages of action potential as follows:
A is greater than BA is greater than BB is greater than AWhat is an action potential?An action potential is a sudden change in the voltage across the membrane of a resting neuron resulting in transmission of impulse.
An action potential results in variation of neuronal membrane to sodium and potassium ions.
A. Resting neuron's permeability to K >>> B. Resting neuron's permeability to Na
Thus, A is greater than B.A. Neuron's permeability to Na during the rising phase of an action potential >>> B. Neuron's permeability to K during the rising phase of an action potential.
Thus, A is greater than B.A. Neuron's permeability to Na during the falling phase of an action potential <<< B. Neuron's permeability to K during the falling phase of an action potential.
B is greater than A.Therefore, the permeability of the neuron membrane to Na and K differs with the stages of action potential.
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PLEASE HELP !!!!!Which of the following describes a process of succession after a forest fire?
O A. Small plants and trees grow back at the same time.
OB. Animals and plants both grow in the area. C. Small plants grow but are eventually replaced by larger plants.
D. Two types of plants grow side by side.
Answer:
c) small plants grow but eventually replaced by larger plants.
A. Point Source
B. Non-Point Source
This would be
considered what
type of water
pollution?
The given scenario would be considered "Point Source" water pollution.
Point source water pollution refers to the contamination of water bodies that can be traced back to a specific, identifiable source or location. This type of pollution occurs when pollutants are discharged directly into water bodies through pipes, drains, or other identifiable outlets.
These sources can include industrial facilities, wastewater treatment plants, oil spills, or sewage systems. Point source pollution is relatively easier to monitor and control because the source is identifiable, allowing for targeted measures to reduce or eliminate the pollution.
In contrast, non-point source pollution refers to pollution that is more diffuse and comes from multiple, widespread sources, such as agricultural runoff, urban runoff, or atmospheric deposition.
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If a population is in Hardy- Weinberg equilibrium, what is happening to that population? A. It is experiencing a shift in population size. B. It is not evolving. C. The population is migrating. D. Individuals are experiencing variations within the species. If a population is in Hardy Weinberg equilibrium , what is happening to that population ? A. It is experiencing a shift in population size . B. It is not evolving . C. The population is migrating . D. Individuals are experiencing variations within the species .
Answer:
Its B
Explanation:
Its not going to EVOLVE
In adult circumcision, a ________ incision is made in the skin and carried circumferentially.
During adult circumcision, a dorsal incision is made in the skin of an individual and carried circumferentially.
What is circumcision?Circumcision can be defined as a surgical procedure that involves a removal of the foreskin from the pe-nis (genital) of a male organism, especially at infant stage.
Based on medical information, a dorsal incision is made in the skin of an individual and carried circumferentially during the removal of the foreskin from the pe-nis (genital) of an adult (adult circumcision).
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Which of the following describes a limiting factor of population size?
A. Birth rate
B. Death rate
C. Gestation
D. Water availability
What 4 features do all chordates have?
All chordates share some structures during at least some stage of their development. These are the notochord, nerve cord, pharyngeal slits, and tail.
What are chordates?When talking about chordates we are referring to the chordate phylum. Individuals composing this group share four main structures,
Notochord
The notochord is a dorsal spine precursor from which the nervous system gets formed.
The notochord is present during the whole individual's life (like some tunicates) or during only the embryonary period (like vertebrates).
Nerve cord
The nerve cord is dorsally located, together with the notochord.
It is hollow, and, during embryogenesis, it might differentiate into a brain.
This cord connects external stimuli to the motor system to react to them.
Pharyngeal slits
Present only during a period of the embryonary stage. These slits give rise to different organs and structures like tonsils, ears, or gills.
Tail
All chordates have a tail in at least a period of the organism's development.
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4 which two biomolecules are most often
analyzed to establish homologies between
different species?
Answer:
DNA and protein
Explanation:
two biomolecules are most often
analyzed to establish homologies between
different species are DNA and proteins
Classify each substance based on the intermolecular forces present in that substance.
The classification of the given substances can be H2O have hydrogen bond, CH4 have Dipole-dipole interaction, CH3Cl has dipole–dipole and dispersion only.
What are intramolecular forces?An intermolecular force (IMF) (or secondary force) is the force that mediates the interaction of molecules, including electromagnetic forces of attraction or repulsion that act between atoms and other types of neighboring particles, such as atoms or ions.
The complete question is:
Classify each substance based on the intermolecular forces present in that substance. Hydrogen bonding, dipole–dipole, and dispersion Dipole–dipole and dispersion only Dispersion only.
H20CH4COCH3ClThe classification of the given substances can be H2O have hydrogen bond, CH4 have Dipole-dipole interaction, CH3Cl has dipole–dipole and dispersion only.
Thus, this can be the possible classification for the given scenario.
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Correct Value: 12.75
8.5
8.4
8.4
8.3
I don't understand your question maybe try rephrasing?
What is the main function of fungus’s hyphae?
Absorption of nutrients
Movement in water
Predator protection
Photosynthesis
The main function of fungus’s hyphae is the Absorption of nutrients by the fluttery filaments that make up multicellular fungi are called hyphae. As they consume resources from a food source, they release enzymes.
What are the fungal hyphae?The fluttery filaments that make up multicellular fungi are called hyphae. As they consume resources from a food source, they release enzymes. Chitin makes up the rigid cell wall of hyphae. In pursuit of more food sources, they spread out from a tip and continue to expand.
The substrate is broken down by digestive enzymes secreted by the hyphae, which makes it simpler for the fungus to absorb the nutrients it contains. The fungus has a very wide surface area compared to its volume, which indicates that it is in close contact with its surroundings.
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Answer: it’s A
Explanation: truss it is
. A topographic map has a fractional scale of 1:80 000. The units are in centimeters. If two cities are 3 km apart, how far apart would they be on the map?
3km to cm = 300000 cm
300000/ 80000 = 3.75 cm
they will be 3.75 cm far on the map
1 km represents 4 cm, so 3 km will be equal to 4 × 3 = 12 cm. So, they will be 12 cm apart.
What is a topographic map?Topographic maps are precise, in-depth depictions of terrain characteristics found on the surface of the Earth.
These qualities consist of: Roads, buildings, urban development, railroads, airports, place names, geographical characteristics, administrative borders, state, and international borders, and reserves are examples of cultural items lake, river, stream, marsh, and coastal flat hydrography
Relief features include mountains, valleys, cliffs, and depressions.
vegetation: vineyards, orchards, and cleared and forested landscapes.
A map's legend (or key) provides a list of the features depicted on the map together with the accompanying symbols.
A global graticule and a coordinates grid are often displayed on topographic maps so you can identify the relative and absolute locations of depicted features.
A map is only a two- or three-dimensional depiction of the actual world at a specific time, it is vital to remember this. A map will therefore never be completely accurate.
Maps often become out of date as a consequence of changes to the environment and cultural characteristics (such as roads, plants, and buildings), albeit the pace of expiration varies depending on the region.
Therefore, they will be 12 cm apart.
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1. Define Isogamous with example.
2. Define Anisogamous with example.
3. Define Oogamous with example.
Answer:
1. Having two similar gametes in which no differentiation can be distinguished, or reproducing by the union of such gametes.
e.g. in Spirogyra and Ulothrix
2. Anisogamy refers to a type of sexual reproduction in which two dissimilar gametes unite or fuse. The gametes may differ in size or form.
Example : human beings, the male gamete sperm is smaller and motile while the female gamete egg is non motile and larger.
3. having or involving a small motile male gamete and a large immotile female gamete.
E.g. Volvox, Fucus
Survivorship types cab be gaphed to depict survival percentages over time. Examine four graphs below: (graph in the picture )
which curve on the graph represents a species that produces high numbers of offspring with paternal care?
A. Graph 1
B. Graph 2
C. Graph 3
D. Graph 4
Graph 3 shows a species that produces high numbers of offspring with paternal care.
What is the survivorship curve?The survivorship curve gives us a idea of the number of individuals in the population that are expected to survive and reproduce at any given time. We have to note that paternal care increases the chances of survival of the organism.
Hence, graph 3 shows a species that produces high numbers of offspring with paternal care.
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why does ventricular tachycardia cause syncope
Tachycardias, or extremely rapid heartbeats, can cause syncope. Examples include supraventricular tachycardia (SVT) and ventricular tachycardia.
Tachycardia and how it causes syncope
The lower chambers (ventricles) are where ventricular tachycardia starts and it is extremely rapid. Ventricular tachycardia may not be problematic if it lasts only a few seconds. However, persistent ventricular tachycardia might drop blood pressure, which can cause syncope (fainting) or dizziness.To learn more about tachycardia and syncope, refer to-
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ou are part of a research group that is attempting to improve on the beneficial genetic modification of golden rice, to further reduce global hunger issues. Which of the following difficulties will you likely encounter?
A. Greater difficulty growing the crops in harsh environments.
B. Allergic reactions to the rice from people who were previously unaffected.
C. More chemical pesticides would be needed to protect them.
D. Price of the rice would increase.
Price of the rice would increase difficulties will you likely encounter. Thus, the correct option is D.
What is golden rice?Golden rice gets its name from the beta-carotene that gives it its golden hue. Beta-carotene is not expressed in the endosperm of normal rice, Oryza sativa, the starchiest and largest component of the rice seed and often an off-white hue.
More the cheaper the rate more will be the consumption by people which leads to cut off from disease.
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Which is an abiotic factor that can be found in a rain forest ecosystem?
Answer:
rainfall
Explanation:
there is a high rate of rainfall in rainforest, therefore amount of rain fall being abiotic factor can affect rain forest
Which
of the following could be considered a reliable source of scientific
information?
Answer: Textbook
Explanation: just took it
Earth is a closed system. That means the amount of rocks, metals, carbon, nitrogen, oxygen, and water on Earth . So, it is essential that biogeochemical cycles these materials as they move through Earth's subsystems.
Earth is a closed system, which means the amount of rocks, metals, carbon, nitrogen, oxygen, and water on Earth remains constant. So, it is essential that biogeochemical cycles renew these materials as they move through Earth's subsystems.
What are biogeochemical cycles?Biogeochemical cycles may be defined as the flow of chemical elements and compounds between living organisms and the physical environment for the need of each other.
The complete question is as follows:
Earth is a closed system. which means the amount of rocks, metals, carbon, nitrogen, oxygen, and water on earth ___. So, it is essential that biogeochemical cycles __ these materials as they move through earth subsystems.
remains constant, can increase, can decrease.destroy, create, renew.The biogeochemical cycles on the earth's planet are accountable for processing the identical old rocks, metals, carbon, nitrogen, oxygen, water, and other abiotic implications on Earth in order to intrinsically revitalize them and construct them obtainable for reuse for the organisms need.
Therefore, it is well described above.
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Answer:
Earth is a closed system. That means the amount of rocks, metals, carbon, nitrogen, oxygen, and water on Earth remains constant. So, it is essential that biogeochemical cycles renew these materials as they move through Earth's subsystems.
Explanation: ed mentum or plato
What plants have stems that grow along the ground
[tex]\huge\purple{Hi!}[/tex]
watermelon, strawberry, pumpkin and sweet potatoes plants have stems that grow along the ground.
Attachment of herpesviruses results in ________, a process in which the host cell facilitates viral entry.
The attachment of herpes viruses results in endocytosis, a process in which the host cell facilitates viral entry.
What is endocytosis?Endocytosis refers to the cellular physiological process where a cell engulfs foreign particles.
This cellular process (endocytosis) is very common to obtain certain substances from the surrounding environment.
In conclusion, the attachment of herpes viruses results in endocytosis, a process in which the host cell facilitates viral entry.
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