Download E.S. 1.3 Study Guide (assigned 10/4/12)

Name:___________________
Period:_______Date:_______
Env. Science
Section 1.3 “Interactions …” (pg 24)
1. How does natural selection
work?
2. What are adaptations?
3. What are the three main types of
interactions among organisms?
4. What happens if two species
occupy the same niche?
5. Define competition.
6. Considering predation, what
happens when the death rate
exceeds the birth rate of the
organism seen as prey?
7. How are populations of predators
and their prey associated?
Name:___________________
Period:_______Date:_______
8. Why do predators need
adaptations?
9. Organisms seen as prey also use
adaptations as defense strategies.
Describe two of the defense
strategies found on pg 29.
10. Define symbiosis.
11. What is mutualism?
12. Why is commensalism not all
that common within nature?
13. Considering parasitism, what is a
parasite? What is a host?
14. Write an example of a parasitic
relationship.