The weaking of rock due to expansion and contraction resulting from tempertature changes is known as

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

What factors contribute to the effect an environmental toxin has on the human body?

Is dna the same in every cell in the human body explain your answer