Answer: peristalsis
Explanation:it's the contraction and relaxation of muscles as the bolus moves down the oesophagus
Answer:
Polyphyletic relationships .
Explanation:
The primary goal of modern systematics is construct 'family trees' that exhibit polyphyletic relationships because systemics deals with grouping or organising living organisms into groups base on biological meanings of function and polyphyletic relationships which is organising or grouping of organisms that don't have common ancestors Into different groups or unrelated organisms.
The answer A. DNA in the nucleus controls all cell activity.
