Plant cells have cell walls, while animal cells do not. which statement best elaborates on the reason for this difference

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Which statement best describes how the nucleus, the rough endoplasmic reticulum, and ribosomes interact during protein synthesis?

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area