11. when does the nuclear membrane dissolve in mitosis?



12. human cells contain 46 chromosomes before mitosis. how many do they have after mitosis?



13. during anaphase, what structures are attached to the centromeres?



14. describe the function of the centriole in animal cells.



15. when do chromosomes become visible in mitosis?



16. chromatids move to opposite poles of a cell during anaphase and telophase. what appears to be the mechanism for the pulling action?



17. how can you tell whether cells in mitosis are animal cells or plant cells?



18. what are the main events that occur during interphase?

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

What are genotypes? what are phenotypes?

What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.