Plant Biology

Abscisic acid, a plant hormone involved in responses to water stress.

The movement of substances across a cell membrane using energy.

Attraction between water molecules and another surface.

A region of actively dividing cells at the tip of a stem that produces new growth.

An organism that makes its own food using sunlight or chemical energy.

Thin layer of relatively still air surrounding a surface such as a leaf.

Photosynthetic adaptation in which stomata typically open mainly at night.

A layer of dividing cells that produces new xylem and phloem in woody plants.

The amount of carbon dioxide available in the air for photosynthesis.

A rigid outer layer surrounding plant cells, made mainly of cellulose.