Which of the following show population variation?

bacteria becomes resistant to penicillin.

galapagos island finches have different sized beaks depending on which island they are on because of the different kind of seeds available to eat on each island.

different breeds of dogs all have tails to show their people when they're happy.

all the islands of galapagos have finches.

answer; ///i believe the answer is (antioxidant);

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.