Which is the correct statement that distinguishes mitosis from meiosis?
a. mitosis occurs in germ cells and meiosis occurs in somatic cells.
b. crossing over takes place in mitosis and not in meiotic cell division.
c. meiosis produces four 2n daughter cells; mitosis produces two 2n daughter cells.
d. the number of chromosomes remains the same in mitosis and is reduced by half in meiosis.

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

Climate warming trends allow plant and insect species to inhabit larger ranges. select the best answer from the choices provided

Along what geographical feature are most of the oil producing regions located