Light is made up of tiny bundles of energy called a: photographs b; photons c: neurons d. none of the above

What are genotypes? what are phenotypes?

What is the importantence of the carbon and nitretan cycles in the environment

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation