Adaptation, in biology, the process by which a living thing becomes better suited to its environment. See more »

Age, a term for (1) periods of time, as in human history or the history of the earth, and (2) the length of time an organism has lived or normally lives, or the length of time an object or material has existed. See more »

Albumin, a simple protein found in most animals and in some plants. Albumins dissolve in water and dilute salt solutions and coagulate (curdle or clot) in the presence of heat. See more »

Amino Acids, chemical compounds produced by living organisms. Many amino acids are the structural units of proteins. See more »

Biology, the science that deals with living things. The earth is home to a diverse range of living organisms. See more »

Evolution, as defined in biology, the continual process by which one form of life changes, or evolves, into another form. See more »

Microbiology, the branch of biology concerned with microorganisms including viruses, bacteria, protozoans, and certain algae and fungi. See more »

Microorganism, or Microbe, an organism so small that it cannot be seen without the aid of a microscope. See more »

Mutation, in a general sense, any change in the genetic makeup of an organism; such a change usually causes the organism to have a trait not possessed by any of its ancestors. See more »

Osmosis, the spontaneous flow of a liquid or gaseous substance through a semipermeable membrane. See more »