If later is was 100 million years ago, later b would be 200 million years ago (because it is 100millions years prior to a). And therefore layer c must b 300 million years ago.
A gene transcription occurs when the RNA copy of a gene sequence is made.
<h3>What is gene?</h3>
Although your question is incomplete as the image is lacking but I will try to help you the much I can. Gene is a unit of inheritance found in the chromosomes.
A gene transcription occurs when the RNA copy of a gene sequence is made. The correct image can not be located as the image attachment is lacking.
Learn more about gene:brainly.com/question/787658
Cholera develops when the bacterial toxin prevents G-protein inactivation , which leads to the continuous production of cAMP.
There is no such thing ? It can't be an organism if it does not do any of the above
Scar tissue is made of a protein called collagen
