Answer:
C. cell membranes
Explanation:
the black/dark material that is visible in many of these onion cells is cell membranes.
The answer is true all skeletal muscles are attached to some component of the skeleton, unlike smooth muscle which comprises hollow organs such as the intestines or blood vessels.
Answer:
The partial pressure of oxygen is high in the alveoli and low in the blood of the pulmonary capillaries
Food chains are for example something that another thing eats and it goes down to many different selections and starts off big and vies to small things
Answer:
no the cell are not replication mitosis as 800000 cell die and reproduce each second
