"the best explanation for all of these offspring being female is that
(1)there is not enough food to support male aphids
(2)asexual reproduction produces offspring with many mutations
(3)only the females are able to feed on the sap of the plants
(4)asexual reproduction produces offspring that are genetically identical to the parent"

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination