In humans structures that absorb most of the products of digestion are the

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass

List five ways we are indebted to phytoplankton

Aprocedure done under controlled conditions to test a hypothesis is an inquiry.