35 What You Know So Far

Summarise what you know about this topic so far under the headings provided. You can draw diagrams or mind maps, or write short notes to organise your thoughts in preparation for the NCEA style essay question that follows. Use the points in the introduction and the hints provided to help you:

Biological rhythms in animals HINT: Include definitions that clarify the length and type of rhythm involved.

Investigating circadian rhythms HINT: Explain how activity patterns are recorded and include reference to freerunning period and entrainment.

Photoperiodism in plants HINT: Include definitions and reference to the role of phytochrome.

Biological rhythms in plants HINT: Include reference to phytohormones and the timing of key events in plant life cycles.