Which statement most accurately describes smooth er? a. series of membrane-enclosed sacs that detoxify substances and synthesize lipids and carbohydrates b. stack of flattened sacs that modify and sort proteins c. contain(s) digestive enzymes d. series of membrane-enclosed sacs with ribosomes on the surface

I just need the points

Explanation:

Ya thats right!!!

before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms