Selective pressure could be any phenomena that would most probably alter behavior and fitness of living organisms in an environment. It is the driving force of evolution and natural selection. Thus, selective pressures influence or leads to the evolution of organisms. Some of the organisms will not survive, reproduce thus, some members of the generation will not be able to pass their genes to the next generation.
Answer:
Nucleus
Explanation:
The most important organelle is the nucleus. The nucleus is like the brain of a cell. It controls all actions that the cell undertakes. The nucleus can do this because it contains DNA.
Prophase- <span>chromosomes become visible as paired chromatids and the nuclear envelope disappears.
metaphase- </span><span>chromosomes become attached to the spindle fibers.
anaphase- </span><span>chromosomes move away from one another to opposite poles of the spindle.
telophase- </span><span>the final phase of cell division in which chromatids, or chromosomes, move to opposite ends of the cell and two nuclei are formed.</span>