The waste product of respiration is: carbon, oxygen, carbon dioxide, nitrogen

In each transformation of energy , some energy what?

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

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?