Which of the following describes asexual reproduction?
fertile offspring despite geographic isolation
one parent organism and no egg or sperm
two parent organisms and genetic exchange
infertile offspring through genetic exchange

Use the drop-down menu to match the following definitions to the corresponding terms. the total variety of organisms that live in the biosphere a group of organisms that breed and produce offspring that can breed all of the biotic and abiotic factors in an area

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

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?