Please help and explain.

1 answer:

4 0

I got you :)

The molecular clock (based on the molecular clock hypothesis (MCH)) is a technique in molecular evolution that uses fossil constraints and rates of molecular change to deduce the time in geologic history when two species or other taxa diverged. It is used to estimate the time of occurrence of events called speciation or radiation. The molecular data used for such calculations is usually nucleotide sequences for DNA or amino acid sequences for proteins. It is sometimes called a gene clock or evolutionary clock.

You might be interested in

Which explains the outer gas planets when the solar system formed?

Korvikt [17]

The correct answer is B The young sun's solar winds pushed gases outward to the outer solar system.

6 0

3 years ago

Dr. Han is studying which brain structure is associated with aggressive behavior among rats. Which part of the brain is she like

djyliett [7]

Answer:

The correct answer is - The amygdala

Explanation:

The amygdala is the part of the brain that is found in the medial temporal lobe of the brain. It is an almond-shaped structure of neurons. The amygdala is an essential region of the brain that has a major role in processing emotions such as aggression and others. It is the region of the limbic system that presents both sides of the brain.

Thus, the correct answer is - the amygdala.

7 0

2 years ago

A team of scientists conducted a study of grassland ecosystem and estimated the total energy at each trophic level. Their data i

maria [59]

Answer:

In grassland ecosystem, first trophic level is the producer. Producers are the organisms which makes their own food, here the producer are grasses. The second trohic level contain herbivores which feed on these grasses. These herbivores are eaten by secondary consumers which belongs to third trophic level and secondary consumers are then eaten by tertiary consumer.

The population of producers are very high so it is placed at the base while tertiary consumer are placed on the top due to low population.

8 0

2 years ago

30. Why can mitochondria be considered the power plants of the aerobic cells?

Svetach [21]

Mitochondria produce ATP, energy that is vital in aerobic cells. Therefore, I believe this is why they can be considered as power plants.

8 0

3 years ago

55 Which of the following is an advantage of

Savatey [412]

<u>Answer</u>:

"It increases the mutation rate" is an advantage of sexual reproduction

<u>Explanation</u>:

The basic thing of evolution is fundamental, as it helps in generation of genetic variation on which the selection can act. Sexual reproduction leads to genetic diversity, and this genetic diversity leads to increase the mutation rate. Genetic diversity occurs because of two various cells which are combining together and biological assortment which happens at the time of cell division. Neutral genetic diversity in the population leads to high mutation rate.

4 0

2 years ago