The answer is convergent evolution.
<span>A convergent evolution is a phenomenon of independent evolution of
similar traits in species that are in different lineages. These traits are called analogues structures. They are similar in form or function but were not present in the last common ancestor of
those species. So, t</span><span>he appendages of cockroaches and turtles are analogues structures with the similar function - creeping movements, and they are the result of the convergent evolution.</span>
Answer
Environmental pressures
Basically every animal adapts to pressures from their environment in different ways, causing them to have different shapes and sizes
Answer:
Answer is A signal is sent down an exon within a nerve cell.
Explanation: