The years in which two species share a common ancestor if the molecules found in these two species differ by a total of six mutations is 72 million years.
What is mutation?Mutation is the changing of gene or characters of any species over time, there are many reasons for mutation, like natural selection.
Every 12 million years, the molecular clock will mutate.
If the molecular clock experiences six mutations, 12 million years multiplied by 6 have passed.
12 x 6 = 72
Thus, the years are 72 million years. Option is b.
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Answer:
D) 36 million
Explanation:
The person above forgot the last step: Divide by the number of species
Crabeater seals eat krill.
Fishermen catch large amounts of krill from the sea.
How would a decrease in the number of krill affect the number of
crabeater seals?
___________________________________________________________________
_____________________________________________
Leopard seals also eat krill.
A decrease in the number of krill will affect the crabeater seals sooner
than it affects leopard seals.
Give the reason for this.
if the number of individuals in the krill decreased, then the crab and crabeater seal populations would decrease because there would not be enough food for all of the individuals of their populations to eat.
What happens during prophase of meiosis I?
Answer:
Meiosis I, the first meiotic division, begins with prophase I. During prophase I, the complex of DNA and protein known as chromatin condenses to form chromosomes. The pairs of replicated chromosomes are known as sister chromatids, and they remain joined at a central point called the centromere.
Explanation:
✓
What is the circulatory system?
A) Temperature Regulator
B) Transport System
C) Immune System Booster
D) Heater
Answer:
It has to do with the body. So, B
Explanation:
Answer:
B transport system.
Explanation:
The circulatory system, circulates (carries) blood around the body.
Worldwide, what percentage of human water usage does industry account for? (Note: This relates to water usage now, not water supply.) What is the percentage in the United States?
Worldwide, 19% of human water usage does industry account for. While the percentage of United States withdrawals total of 5% of water usage for industrial purposes.
What percent of water is used in the United States for thermoelectric power?A total of 49% of water is used in the United States for thermoelectric power.
Apart from this, Industrial and manufacturing businesses also utilize about 12 percent of the public water supply in the United States.
Therefore, it is well described above.
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Black coat color is dominant over white coat color in guinea pigs. in addition to coat color, rough coat is dominant over smooth coat.
b. Demonstrate a cross between a heterozygous black/homozygous smooth and homozygous white/heterozygous rough. describe the phenotypes as fractions?
Answer:
Explanation:
C = dominant black coat
c = recessive white coat
T = dominant rough coat
t = recessive smooth coat
Heterozygous black coat + Homozygous smooth guinea pig genotype:
Cc tt
homozygous white/heterozygous rough:
cc Tt
Punnett Square
After looking at Punnett squares attached, we can see that 1/2 of offspring are either black or white and 1/2 of offspring are either rough or smooth.
Cc - black coat - 2/4 - 1/2
cc - white coat - 2/4 - 1/2
Tt - rough coat - 2/4 - 1/2
tt - smooth coat - 2/4 - 1/2
Which of these describes ATP?
A. the site of photosynthesis
B. genetic material
C. energy storage
D. cell waste
Answer:
C
Explanation:
ATP has to do with energy so the correct answer would be energy storage.
The one that describes ATP is energy storage. The correct option is C.
What is ATP?A chemical that is a part of all living cells and gives energy to a variety of metabolic processes, including the production of RNA.
In patients with advanced solid tumors, the effects of laboratory-produced ATP on weight loss and muscle strength are being investigated. Likewise known as adenosine triphosphate.
The principal energy source for critical biological processes such muscular contraction, nerve impulse transmission, and protein synthesis is ATP generated in mitochondria.
For example, large levels of ATP signal that the cell has enough ATP and does not need to produce any more through cellular respiration. In this instance, a product "feeds back" to block its pathway, which is a form of feedback inhibition.
Thus, the correct option is C.
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In which situation would new technology be most likely to cause a change in an existing theory about new structures a cell?
The new technology makes it possible to detect and analyze a structure more rapidly.
The new technology allows scientists to confirm the presence of an existing structure in a cell.
The new technology makes it possible to produce additional structures that were not previously there.
The new technology allows detection of a structure that could not be detected previously.
The situation that the new technology be most likely to cause a change in an existing theory about new structures of a cell is the new technology allows detection of a structure that could not be detected previously.
What is a technology?Technology is the application of scientific knowledge for practical purposes. Technology is used in the advancement of the worlds. New technologies help to solve many problems that were impossible before.
Thus, the correct option is D.
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The new technology allows detection of a structure that could not be detected previously. Thus, the correct option is D.
What are the benefits of technology?
Sales will probably improve as a result of technology that makes it simpler for people to buy from you, including an e-commerce solution and numerous payment apps. Marketing departments are forced to adapt the social media platforms that your clients and potential customers use since they are born and die on a monthly basis.
The tasks that HR departments perform for hiring, reviewing applicants, onboarding, and training involve a significant amount of technology. The more HR duties you can complete using technology, the quicker they can be completed and the less likely it is that you will make a mistake that could result in a lost recruit, an employee leaving, or a lawsuit. Employee education on topics like benefit enrollment and corporate policies, for instance, guarantees appropriate paperwork is done and cuts down on training time for new hires.
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What is the founder effect?
A(when an individual is lonely
B(When individuals join a population and their genes merge into the pool.
C) When individuals become isolated from the
larger populations and the gene pool differs
from the original population over time
Answer:
What is founder effect
Explanation:
i think C)
What happens when the body fails to take up excess glucose from the blood a. The excess glucose binds to working proteins, rendering them nonfunctional. b. The excess glucose is metabolized to produce energy for physical activities. c. The excess glucose retains water in the body to prevent dehydration. d. The excess glucose from the blood gets stored in the adipocytes. e. The excess glucose gets converted into useful alcohols.
Explanation:The excess glucose gets converted into useful alcohols.
When the body is unable to take up excess glucose from the blood then at time the fats from the blood gets stored in fats storing cells called as adipocytes. The excess glucose gets converted into useful alcohols. Last option is correct.
What are adipocytes ?These are the cells that store fats in the human body are called as adipocytes. These are the main energy storing cells.
The excess glucose gets converted into useful alcohols.
At this situation glucose is provided by the the carbohydrates where the glucose is the stored compound in the form of glycogen.
Therefore, the excess glucose is stored in the form of useful alcohols.
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what would happen if glycolsis could not happen in a cell
Answer:
The cell would die.
Explanation:
If glycolysis is interrupted, these cells lose their ability to maintain their sodium-potassium pumps, and eventually, they die. The last step in glycolysis will not occur if pyruvate kinase, the enzyme that catalyzes the formation of pyruvate, is not available in sufficient quantities.
What material is too important to ever
leave the nucleus?
A. DNA
C. Ribosomes
B. Protein
D. Mitochondria
Answer:
A. DNA
(out of all the options, the DNA molecules must never leave the nucleus)
Correct option:
What is D.N.A.?Discoverer: Friedrich Miescher
Date of Invention: 1869
'DNA' is usually defined as: deoxyribonucleic acid: an extremely long macromolecule that is the main component of chromosomes and is the material that transfers genetic characteristics in all life forms, constructed of two nucleotide strands coiled around each other in a ladderlike arrangement with the sidepieces composed of alternating phosphate and deoxyribose units and the rungs composed of the purine and pyrimidine bases adenine, guanin, cytosine, and thymine: the genetic information of the DNA is encoded in the sequence of the bases and is transcribed as the strands unwind and replicate.
Other options:
What are ribosomes?A cell organelle constructed in the nucleolus and functioning as the site of protein synthesis in the cytoplasm; consists of rRNA and protein molecules, which make up two subunits.
What is protein?Any of the numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the diet of all animals and other nonphotosynthesizing organisms, composed of 20 or more amino acids linked in a genetically controlled linear sequence into one more polypeptide chains, the final shape and other properties of each protein being determined by the side chains of the amino acids and their chemical attachments: proteins include such specialized form of collagen for supportive tissue, hemoglobin for transport, antibodies for immune defense, and enzymes for metabolism.
What is the mitochondria?An organelle in the cytoplasm of cells that function in energy production.
The "powerhouse" of a cell.
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Diffusion does not require any energy.
How does diffusion work?
A. Particles move from areas of higher concentration to
areas of lower concentration.
B. Molecules are moving AGAINST a concentration
gradient.
C. Heat is released making molecules move more quickly.
D. Cells only use energy to move substances across the
membrane.
A - Read below
Diffusion is simply particles spreading around. Think of it like spraying perfume in a room. Where the person sprayed the perfume would be a high concentration as there is a lot of that perfume there. However, on the other side of the room there would be little to no perfume. So the perfume spreads around until it is evenly distributed in the room.
24. New crust (oceanic plate) is formed at (4 points)
transform plate boundaries.
subduction boundaries.
O collision boundaries.
O divergent plate boundaries.
A permanent change in the DNA sequence of a gene
Answer:
A mutation.
Explanation: When a cell mutates is will be permanently changed.
Place the following in order of blood flow back to the heart.
- heart
- capillaries
- veins
- superior and inferior vena cava
For which of the following problems would growing and maintaining cover crops be an appropriate solution? (3 points)
I. Erosion is thinning the soil on a farm.
II. The organic matter and nutrients in the soil on a farm are being depleted.
III. The soil on a farm is becoming arid due to decreased water-carrying capacity.
A. I and II only
B. I and III only
C. II and III only
D. I, II, and III
Cover crops are suitable for preventing erosion, evapotranspiration of water from soils, as well as prevent leaching of nutrients. The correct option is D.
Functions of cover cropsCover crops are grown primarily to protect the soil from the following:
water and wind erosionexcessive evaporation of watermineralization of nutrientsweed and pests.In addition, some cover crops are able to fix nitrogen into soils and serve as a source of green manure for the soil.
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shin splints usually occur on the ___ part of the ___ leg.
Shin splints usually occur on the inner part of the lower leg.
What is known as shin split?
This is the type of muscle spit that occurs to the leg due to the fact that it has undergone stress.
This is mostly seen in athletes. Continued stress on the shin bone is one of the factors that is known to cause shin split in people.
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Really need help on this asap pleasee!
giving out 15 points out for this :)
What are some possible benefits and dangers if the DNA is used to create a mutant form of the organism?
Explanation:
The majority of mutations have neither negative nor positive effects on the organism in which they occur. These mutations are called neutral mutations. Examples include silent point mutations. They are neutral because they do not change the amino acids in the proteins they encode.
Many other mutations have no effect on the organism because they are repaired beforeprotein synthesis occurs. Cells have multiple repair mechanisms to fix mutations in DNA. One way DNA can be repaired is illustrated in Figure below. If a cell’s DNA is permanently damaged and cannot be repaired, the cell is likely to be prevented from dividing.
Root hair cells absorb MINERALS from the soil by the process of…
Answer:
oot hair cells
Plants absorb water from the soil by osmosis. They absorb mineral ions by active transport, against the concentration gradient.
Explanation:
Which of the following is the disadvantage of sexual reproduction?
A. Formation of new characteristics
B. Increased diversity of the species
C. More survival rates
D. Mate selection
Answer:
I think that it is mate selection though not sure
cellular membrane are permeable to _______ but impermeable to __________
Cellular membrane are permeable to nutrients but impermeable to protein.
What is cell membrane?Cell membrane is the cellular structure that surrounds the cell which is semi permeable thereby selecting the substances that either leaves or enters the cell.
Nutrients are chemical that helps to sustain the cell while proteins are used to build up worn out part of the cell.
Therefore, the cell membrane allows the cell to absorb nutrients by resists the removal of proteins.
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The cost of renewable energies has increased over the last decade
A. true
B. False
Brad is swimming in the ocean on a hot sunny day. he finds the water to be much colder than the sand on the beach, even though the sun is warming them both. identify the reasons for brad’s observation. the water is colder than the sand because it requires more to change temperature. this is because the water has a higher than the sand.
Answer:
The sea has a higher specific heat capacity than the sand meaning it takes more energy to heat up. The sand has a lower SHC so it requires less energy to heat up therefore heats faster and Brad will observe the sand to be hotter than the sea
The sea has a higher specific heat capacity than the sand meaning it takes more energy to heat up.
What do you mean by specific heat capacity?The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
In thermodynamics, the specific heat capacity of a substance is the heat capacity of a sample of the substance divided by the mass of the sample, also sometimes referred to as massic heat capacity.
For liquid at room temperature and pressure, the value of specific heat capacity (Cp) is approximately 4.2 J/g°C. This implies that it takes 4.2 joules of energy to raise 1 gram of water by 1 degree Celsius.
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Clouds can decrease the range of daily temperatures because ________.
According to the research, low and thick clouds reflect solar radiation and help to send it back into space during the day.
What are the clouds?It is the mass of aqueous vapor that is suspended in the atmosphere that reflects solar radiation contributing to the cooling of the Earth's surface.
One of the determining factors of daily temperatures is the reflection of solar radiation by the clouds, when there are no clouds in the sky, diffuse radiation is produced through the process of diffusion through atmospheric particles.
Therefore, we can conclude that according to the research, low and thick clouds reflect solar radiation and help to send it back into space during the day.
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What makes a vertebrate chordate different from an invertebrate chordate?
Vertebrate chordates differ from invertebrate chordates by the presence of the vertebral column.
Vertebrate vs invertebrate chordatesChordates are of two groups - vertebrates and invertebrates.
The vertebrate chordates have vertebral columns which developed from the notochord.
The invertebrate chordates, even though possess notochords at some points in their life, do not have vertebral columns.
Vertebrate chordates include fishes, birds, reptiles, and mammals. Invertebrate chordates include the tunicates and the lancelets.
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Which month recorded the lowest amount of ozone over the Antarctic?
Polyploid speciation occurs through _________
a. inbreeding
b. species migration
c. rapid environmental change
d. errors during meiosis
Which statement best describes this eruption?
Its magma is high in silica.
Its magma has low viscosity.
Its gases are released in rapid bursts.
Its lava came from an explosive eruption.
The statement that best describes eruption is the gases are released in rapid bursts. That is option C.
What is a volcanic eruption?A volcanic eruption is defined as the rapid release of the earth crust contents which contain gases, lava and ash.
These are formed when the tectonic plates move over each other in the earth crust.
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Answer:
c
Explanation:
A. Refine the graph by adding the interval of time of extinction with a label drawn from the table as shown by “a”.
B. Analyze these data in terms of the clustering of extinction events.
C. Based on your analysis, explain how ecosystems have changed during the last 40,000 years, changed and identify the factor that caused these changes.
D. Based on the correlation between Earth’s temperature and the concentration of CO2 in the atmosphere, predict what will happen to animal populations in the future.
Answer:
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