Which of the following is a hypothesis for the evolution of sexual reproduction that states that sexual reproduction helps to retain characters that were once beneficial, but may not be now?

suggest that the nucleus was originally a symbiotic prokaryote.

only form vesicles that constitutively fuse with the target membrane.

causes cancer cells to become greatly polarized in membrane function.

begin synthesizing ATP rather than hydrolyzing it.

mitochondrial membrane proteins.

metabolic changes are not a promising avenue for design of anticancer therapies.

Questions 54-58 According to the model for nuclear transport, what do you think would happen if you could artificially limit all Ran-GAP activity to the nucleus and all Ran-GEF activity to the cytosol?

provides cancer cells the ability to live on glucose alone.

Proteins containing an NLS would be actively exported from the nucleus, while NES-containing proteins would be actively imported.