Which of the following processes takes place during prophase?
a. nuclear membranes form around two sets of chromosomes.
b. chromosomes condense.
c. chromosomes are copied.
d. spindle fibers pull the sister chromatids apart.

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the

What contributes to the high level of biodiversity found in wetlands? a. the large amount of available organic matter to organisms that are food for larger organisms b. the amount of available water for organism use c. the high nutrient availability d. all of the above select the best answer from the choices provided a b c d

Why do mountaineers become breathless as they reach high altitudes