The diagram below shows a food web. The organisms in a food web can be classified based on how they get the energy they need.

Which organism in this food web is a primary consumer?

A>mouse

B>snake

C. fox

D. hawk

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

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

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas