Plant Biology

A large central root that grows deeply into the soil.

A measure of how hot or cold something is, affecting the activity of enzymes involved in photosynthesis.

A group of similar cells working together to perform a particular function.

Movement of dissolved organic substances through phloem from sources to sinks.

The loss of water vapour from plant leaves, helping pull water upward through the xylem.

Pulling force created as water evaporates from leaves.

Rate at which water is lost through transpiration.

Continuous movement of water from roots through xylem to leaves.

Firm state of a plant cell containing sufficient water.

Pressure produced when water-filled plant cells press against their cell walls.