2.5 Organisms in their environment

Question 1

What do living organisms form?

Answer 1

Communities

Question 2

What are some physical factors that may affect the distribution of organisms?

Answer 2

Temperature, availability of light, availability of water, availability of carbon dioxide, availability of oxygen, availability of nutrients

Question 3

How does temperature affect the distribution of organisms?

Answer 3

Artcic plants are small which limits the amount of plant eaters which can survive in this area

Question 4

How does availability of light affect the distribution of organisms?

Answer 4

Many few plants can live on the forest floor because the light is blocked

Question 5

How does availability of nutrients affect the distribution of organisms?

Answer 5

Most plants struggle to grow where mineral ions are in short supply, hence few animals will survive here

Question 6

How does availability of water affect the distribution of organisms?

Answer 6

Very few organisms can survive in the desert.

Question 7

How does availability of oxygen affect the distribution of organisms?

Answer 7

Water animals can be affected by lack of oxygen. Most fish need very high levels of dissolved oxygen in the water

Question 8

How does the availability of carbon dioxide affect the distribution of organisms?

Answer 8

Lack of carbon dioxide affects plant growth and consequently the amount of organisms that can survive there