Meiosis produce a. two cells with half as many chromosomes as the parent cell b. two cells with the same number of chromosomes as the parent cell c. two cells that join together d. four cells that each have half as many chromosomes as the parent cell

When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve