If body temperture is to high some blood vessels increase in size and sweat glands will excrete sweat resulting in a lower body temperature these changes are an example of 1: learned behavior
2:feedback mechanism
3:an inherited disorder
4:genetic mutations

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

propane is burned to provide the heat in many cooking grills. the chemical reaction for this process is shown in the equation below.

c3h8 + 5o2 ? 3 co2 + 4h2o + energy

what are the products in this chemical reaction?

3co2 + 4h2o + energy