interactions between organisms - competition

Question 1

intraspecific competition

Answer 1

occurs when individuals of the SAME species compete with one another for resources
e.g. food, water, breeding, habitats, light and so on

Question 2

interspecific competition

Answer 2

occurs when individuals of DIFFERENT species compete with one another for resources
e.g. food, water, breeding, habitats, lights and so on

Question 3

what determines the size of a population

Answer 3

• the availability of resources
• the greater the availability of resources, the larger the population
• the lower the availability of resources, the smaller the population

Question 4

interspecific competition and niche

Answer 4

• where a population of two species occupy the same niche
• one will normally have a competitive advantage over the other
• the population of that species increases, whilst of the other species decreases

Question 5

competitive exclusion principle

Answer 5

when conditions remain the same, competitive advantage of one species will lead to the complete removal of the other species

Question 6

what does the competitive exclusion principle state

Answer 6

• no two species can occupy the same niche indefinitely when resources are limited

Question 7

how to show a factor influences the size of a population

Answer 7

• it can be necessary to link the factor to the birth rate and death rate of individuals in the population