105 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:

Species concept Reproductive isolating mechanisms HINT: Explain prezygotic and postzygotic mechanisms

HINT: How do you define a species?

Processes of speciation HINT: Include definitions for allopatric and sympatric speciation. Explain the role of polyploidy in instant speciation.