The biological way you are built. you get certain genes and dominant/recessive traits from your parents. hope this helps.
Answer: when bright light is present, the pupil reduces in size, or flinching when feeling threatened
Explanation: i know what reflexes are :)
I believe it’s the Carboxyl group but confirm online. Hope this helped :))
Answer:
When there is a cut, and platelets are coming, its positive feedback. But when the clot is formed and increased platelets concentration at the site create a negative feedback to stop sending more platelets for clot formation.