Which can adapt to changes? (a) alleles (b) populations (c) offspring (d) individuals

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

Kudzu vines grow by climbing and wrapping around trees. trees covered by kudzu can die because they are starved of sunlight. what type of relationship exists between the trees and the kudzu growing on them?

What kinds of molecules can pass through the cell membrane without any problem?