Bio 15 pts
programmed cell death (apoptosis) is sometimes called "controlled cell suicide." explain what happens during this process and discuss two specific consequences that could occur if apoptosis did not occur when it should.

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

List two limitations of natural selection

Competition occurs between species when