The number of years of divergence from a common ancestor =300,000 years.
<h3>What are mutations?</h3>
Mutations are changes that occur in the DNA of living organisms.
Mutations can be used as molecular clocks if they occur at a constant rate.
Considering the nucleotide substitutions occur by mistake in a segment of ribosomal RNA at a constant rate of one substitution every 100,000 years.
The ribosomal RNA of the two modern-day species have six differences in their sequences.
Number of years of divergence = 6/2 * 100000 = 300,000 years.
In conclusion, changes that occur in nucleotide sequences are known as mutations.
Learn more about mutations at: brainly.com/question/12572634
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Initiating protective reflex actions is not a role of the basal nuclei
Explanation:
A reflex is the “simplest response” to Stimulus. The two examples of reflex are sneezing and blinking. The main role of reflex is to produces a quick motor response. Reflexes are “very fast” and most of reflexes not reach the brain. Reflex can be understood as blinking of eyes from any danger.
The main role of sensory neuron is to carry impulse from receptors to the spinal cord and motor neuron carry impulses from the spinal cord to the effectors.
Answer:
c. Amount of primary production
Explanation:
Primary production refers to the amount of energy that is converted by organisms from the sun. That is, the primary production is understood as the efficiency of the conversion of energy to organic substances, from the reaction of autotrophic organisms, by solar or chemical energy.
With this concept we can conclude that primary production does not influence the richness and diversity of species, but rather influences the activity of an ecosystem that corresponds to the total amount of organic matter produced in grams over a certain environmental area.
Bacteria and some other prokaryotes consists of restriction enzymes which are able to recognize specific sequences of DNA, called restriction sites. All restriction enzymes are able to recognize at least one or a few restriction sites. On identifying the target sequence, a restriction enzyme makes a double-stranded cut in the DNA molecule. This cut is a clear pattern which is easily identified as it is at or near the restriction site. A DNA fragment with complementary base fragments join with the DNA at the cut portion which is some times referred to as sticky ends
