Which statement correctly compares protists to prokaryotes?
the cells of protists and prokaryotes contain nuclei,
the cells of protists have cell walls, but prokaryotes do not.
both protists and prokaryotes are multicellular.
most protists and all prokaryotes are unicellular.

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

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

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous