What is active transport

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

What is the one part of the nucleotide  that differs among the other different nucle  tides?

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?