Afruit fly has four chromosomes. the zygote formed by the sperm and the egg of fruit flies will have chromosomes.

Which of the following is an example of a non-falsifiable hypothesis? a. there is a teacup orbiting the milky way galaxy. b. there is no life on mars. c. the human species started in africa. d. humans cannot live without the amino acid methionine

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

Compare the composition of the moon's surface with the composition of the earth's surface.