1) Identify 4 stimuli that causes a decrease in the number of producers, consumers, and decomposers living in an area. 2) What could be the effects in relationship to the energy pyramid, population and community of organisms within the environment.

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Hector is back from his morning run and is feeling light-headed because his energy is depleted which food item will provide him with a quick source of carbohydrates

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?