The angle between a leaf and the stem from which it grows.

A bud that forms in the axil of a leaf and may grow into a branch or flower.

A type of placentation in which ovules are attached to the central axis of a compound ovary.

A species of aquatic salamander known for its ability to regenerate limbs and other body parts.

A long, slender projection of a neuron that conducts electrical impulses away from the cell body.

The specific region on a molecule or cell surface where binding of another molecule or structure occurs.

A regulatory sequence in DNA that controls gene expression by forming transcription-terminating structures.

A genus of spiders; not commonly referenced in general biology.

A unit of measurement equal to 10^-18 moles, used in molecular and biochemical assays.

The branch of science and medicine concerned with the sense of hearing.