You give one plant fertilizer and compare how tall it grows to a plant that has not been fertilized. What is the manipulated variable and the responding variable?

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?

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?

Which of the following organisms are capable of self-fertilization? a. plants b. tigers c. humans