Best Answer: centerioles (or centrosomes--some books now call centrioles centrosomes but some books say only animal cells have centerioles) 2. centrosomes are found in plant cells 3.The interphase is a preparatory phase and during this the-nucleus and cytoplasm remain metabolically and synthetically active. The duplication of chromosomal DNA molecules takes place during the S phase of interphase.
A case study of coevolution. Genetic drift. Genetic drift â along with natural selection, mutation, and migration â is one of the basic mechanisms of evolution. In each generation, some individuals may, just by chance, leave behind a few more descendents (and genes, of course!) than other individuals.
evolution. the process of development in which an organ or organism becomes more and more complex by the differentiation of its parts; a continuous and progressive change according to certain laws and by means of resident forces. convergent evolution. the development, in animals that are only distantly related, of similar structures or functions in adaptation to similar environment. divergent evolution. the development of different characteristics in animals that were closely related in response to being placed in different environments.