21 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:

Taxes and kineses HINT: Be sure to include definitions, adaptive value, and examples of both types of responses.

Homing and migration HINT: Include a definition as well as reference to navigation and the benefits and costs of migration.

Tropisms HINT: Include definitions and explain the mechanisms of phototropism and gravitropism.

Nastic responses HINT: How do nastic responses differ from tropisms? What is their purpose?