Which of the following statements is true? A.
All plant cells have at least one vacuole, but only some animal cells have vacuoles.
B.
All animal cells have at least one vacuole, but only some plant cells have vacuoles.
C.
Only a few animal and plant cells have vacuoles.
D.
All animal and plant cells have at least one vacuole.

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

What are genotypes? what are phenotypes?

The (blank) states that all loving things are made of cells.