Answer:
B
Explanation:
a vestigial structure is something that was needed before but is not needed now but remains due to evolution
I would say the answer is a
Explanation:
digestive chemicals the stomach use to break down food is -
A. Hydrochloric acid
The lac operation operates under two different types of mechanisms. Lac operon functions when there is a shortage of glucose but lactose is present. It codes for lactase to break down lactose into glucose and galactose. More cAMP is produced as a result.
