19.3+4 Competition and predation

Question 1

intraspecific competition

Answer 1

individuals of the same species compete for food, water, breeding sites ect

Question 2

availability of resources

Answer 2

less competition, so larger the population

Question 3

interspecific competition

Answer 3

individuals of different species compete for resources

Question 4

competitive exclusion principle

Answer 4

when two species are competing for limited resources, the one that uses resources most effectively will eliminate the other

Question 5

predation

Answer 5

when one organism is consumed by another

Question 6

predation in a lab

Answer 6

not necessarily reflect what happens in the wild
- range and variety of habitat is limited
-difficult to obtain reliable data in natural habitats
-not possible to count all individuals in natural popn

Question 7

predator-prey relationship

Answer 7

1. predators eat prey, reducing population
2. with fewer prey available predators are in greater competition
3. predator population is reduced as some individuals are unable to obtain enough prey for survival or reproduction
4. fewer prey are eaten and more survive and reproduce
5. prey population increases
6. with more prey available , the predator population has more food and increases

Question 8

selection pressure

Answer 8

individuals able to escape predators or withstand disease or adverse climate are more likely to survive and reproduce