The centrosome: is a region of the chromosome where sister chromatids remain attached. is a region of the chromosome where kinetochores attach. is a region of the chromosome where microtubules attach to chromosomes during mitosis. is the microtubule organizing center for the mitotic spindle. all of these choices are correct.

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a. both make it possible for the conditions in the interior to be different from the conditions outside. b. both provide a barrier that keeps water from flowing across it so the interior remains dry. c. both separate the rna that forms in the interior from any rna that might form in the environment. d. both can actively move molecules into the interior or out into the surrounding environment.

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

How does a lytic infection differ from a lysogenic infection?