What is the function of the endoplasmic reticulum in a cell? A)providing a barrier between the cell and its surroundings
B)assembling lipids, proteins, and other materials for export out of the cell
c)converting energy from food into a form the cell can use
D)packaging proteins and other materials from the endoplasmic reticulum for storage in the cell or transport out of the cell

the answer is B

Explanation:

Here is a way:

To estimate how many fish are in a lake is to use the capture/recapture method. Assume you capture 100 fish, you should tag them, then release them back into the water Following, you should capture 100 fish again and count about 12 of the tagged fish. Now, you should assume the proportion of tagged-untagged fish is the same in your sample as the entire lake and assess the number of fish in the water.

[ i don't know if this ↑  is what you were asking for but I tried to help ]