The Requirement of Cold Weather Before a Particular Plant Process

question 55

Multiple Choice

The requirement of cold weather before a particular plant process occurs (e.g., germination) is known as

• A) the biological clock.
• B) vernalization.
• C) photoperiodism.
• D) biennial life cycle.
• E) biorhythm.

---

Definitions:

Pigment

Substances that impart color to materials or organisms; in biological contexts, they absorb certain wavelengths of light and reflect others, visible to the human eye as color.

Chlorophyll

A green pigment found in the chloroplasts of plants, algae, and some bacteria, essential for photosynthesis.

Wavelength

Distance between the crests of two successive waves.

Photolysis

Process by which light energy breaks down a molecule.