Which of the following is true of the structures labeled A in the cell membrane? Choose 1

A
They are membrane proteins.

B
They are carbohydrates.

C
They are entirely hydrophobic.

D
They are phospholipids.

A

Explanation:

they are membrane proteins

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

while the heads of the phospholipid structure attract water, the tails are hydrophobic. the model shows how the hydrophilic section folds around the fluid molecules to bring them into the cell so they don’t need to pass through the hydrophobic tails.