Aspaceship carrying rocks has
less momentum than an empty spaceship
more momentum than an empty spaceship
no momentum
the same amount of momentum as an empty spaceship

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

How are gross production and net production different? a. net production is always greater than gross production. b. net production is always less than gross production. only animals have net production. d. only plants have net production. select the best answer from the choices provided

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?