5. Calculate the kinetic energy of a clown car full of clowns. The car and clowns together equal a mass of 5,300 kg. The car is traveling at a velocity of 20 m/s.
a. 5.3 x 10 4 J (4th power)
b.2.12 x 10 8 J (8th power)
c. 1.78 x 10 6 J (6th power)
d. 1.06 x 10 6 J (6th power)

How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

How and why organisms are hierarchically classifies