Which observation proves that a cell is a prokaryote?
a. it does not have a cytoskeleton
b. it does not have a nucleus
c. it has a cell membrane
d. it has cytosol inside the cell

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

Dna is colied into chromosomes in a cell

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last