Biology: Science for Life, with Physiology - Chapter 26

These flashcards cover key vocabulary terms and definitions regarding plant physiology and adaptations from Chapter 26 of the provided lecture notes.

Transpiration

The process of water lost from leaves through evaporation.

Cohesion

The tendency for identical molecules to stick together, crucial in maintaining water column continuity.

Adhesion

The tendency for unlike molecules to stick together, important for water attachment to plant cell walls.

Mycorrhizae

Symbiotic fungal strands that increase surface area for nutrient and water absorption in plants.

Photoperiodism

Biological response of plants to changes in light and dark proportions within a 24-hour cycle.

Auxin

A plant hormone that promotes cell expansion, apical dominance, and influences tropic responses.

Gravitropism

Directional growth in plants towards or away from gravity; roots show positive gravitropism.

Pressure flow mechanism

Mechanism by which phloem sap moves from source to sink due to pressure differences within the phloem tube.

Adaptations

Modifications in plant physiology and anatomy that help reduce water loss and increase drought tolerance.

Abscission

The process of leaf drop, typically triggered by increasing night lengths as winter approaches.