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

The maintenance of stable internal conditions regardless of external conditions.

An organism that obtains energy by feeding on other organisms.

An organism that can make its 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.

he 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 new nuclei and one copy of the DNA is distributed into each daughter cell.

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

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.

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.