1. What is a species? About how many species exist on the earth? How many of these species have we identified? Why are insects such important species? 2. What are the two key concepts for this...

1. What is a species? About how many species exist on the earth? How many of these species have we identified? Why are insects such important species?

2. What are the two key concepts for this section? Define and distinguish between ecological niche and a habitat. Distinguish between generalist species and specialist species and give an example of each.