What are characteristics of natural selection ? select three options .

It affects populations. It occurs when there is genetic variation. It selects organisms with certain traits to survive.

Explanation: Natural selection is when the individuals with the best survival characteristics survive instead of the weaker individuals. This requires genetic variation. Also, when these stronger individuals breed, they pass on those stronger genetics, making their offspring stronger. This makes the future generation stronger in general.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.