What is the only form of nitrogen that non-legume plants can take in and use

Ascientist and her team counted 200 individual deer in an area of 10 square kilometers. what is the population density?

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

9. the history of life on earth is recorded in