19.4 Predation

Question 1

What is a predator

Answer 1

An organism that feeds on another organism

Question 2

What is a prey

Answer 2

What a predator feeds on

Question 3

What is predation

Answer 3

Preadtion is when one organism is consumed by another

Question 4

What is the effect of predator-prey relationship on population size

Answer 4

1. Predators eat their prey, thereby reducing the population of prey
2. With fewer prey available the predators are in greater competition for the prey that are left
3. The predator population is reduced as some individuals are unable to obtain enough prey for their survival or to reproduce
4. With fewer predators left, fewer prey are eaten and so more survive and are able to reproduce
5. The prey population therefore increases
6. With more prey now available as food, the predator population increases

Question 5

Why is the effect of predator-prey relationships less severe in normal ecosystems

Answer 5

Because a predator has more than one prey