Question

1. which function within the cell is performed by the cell membrane?

a. creating food and energy
b. collecting and storing water
c. containing genetic material
d. controlling what enters and leaves the cell

1. all living cells use similar processes to maintain homeostasis. which statement explains how homeostasis is maintained by cell membranes?

a. cell membranes divide to make new cells.
b. cell membranes combine with other cells to form tissues.
c. cell membranes form organelles with other cells that are nearby.
d. cell membranes keep the liquid volume inside the cell at a constant level.

1. which organelles are found in plant cells but not in animal cells?

a. vacuoles
b. chloroplasts

Explanation:

Question 3

The cell membrane's function related to controlling the movement of substances (what enters and leaves the cell) is a key role. Option A is about creating food (done by chloroplasts in plants), B is about collecting/storing water (vacuoles), C is about containing genetic material (nucleus). So the cell membrane controls what enters and leaves.

Homeostasis maintenance by cell membranes: Cell membranes regulate the passage of substances to maintain internal balance. Option A says cell membranes maintain homeostasis (correct as they control inputs/outputs). B is about cell division (not membrane), C is about forming tissues (cell - cell interactions, not membrane's main homeostasis role), D is about keeping liquid volume (vacuoles/osmoregulation but not the main homeostasis explanation for membranes).

Plant cells have chloroplasts (for photosynthesis), animal cells do not. Vacuoles are present in both (larger in plants, smaller in animals). So chloroplasts are in plant cells but not animal cells.

Answer:

D. controlling what enters and leaves the cell

Question 4