An action or a change in behavior that occurs as a result of a stimulus

The maintenance of stable internal conditions regardless of external conditions

An organism that can make it's own food

The process by which molecules move from an area of higher concentration to an area of lower concentration

The diffusion of water molecules through a selectively permeable membrane

The movement of materials through a cell membrane using cellular energy

The stage of the cell cycle during which the cell's nucleus divides into two nuclei and one copy of the DNA is distributed into each daughter cell

The process that occurs in the formation of sex cells (sperm and egg) by which the number of chromosomes is reduced by half

The genetic material that carries information about an organism and is passed from parents to offspring.

A nucleic acid that plays an important role in the production of proteins

The process by which the genetic code in DNA is transcribed onto a strand of mRNA.

The process by which a protein chain is created from information contained within RNA.

The passing of traits from parents to offspring.

An organism’s physical appearance, or visible traits.

An organism's genetic makeup, or allele combinations

The scientific study of how living things are classified

An organism that obtains energy by feeding on other organisms

A close relationship between two organisms in which at least one of the organisms benefits

The phylum whose members have a notochord, a nerve chord, and slits in their throat area at some point in their lives

An animal whose body regulates its own temperature by controlling the internal heat it produces

An animal whose body does not produce much internal heat

A change in body form characterized by 4 dramatically different stages

A change in body form consisting of the egg, nymph, and adult stages

Plant cell structures in which photosynthesis occurs

A green pigment found in the chloroplasts of plants, algae, and some bacteria