3.2 Distribution of Organisms

Question 1

Define biotic factors and give examples. (5)

Answer 1

Living
e.g. competition for resources, disease, food availability, grazing and predation

Question 2

Define abiotic factors and give examples. (4)

Answer 2

Non-living
e.g. temperature, pH, light intensity, moisture

Question 3

Name 2 techniques for sampling plants and animals.

Answer 3

Quadrats and pitfall traps.

Question 4

What do all sampling techniques need to be evaluated for?

Answer 4

Limitations and sources of errors.

Question 5

What can you use to identify organisms?

Answer 5

Paired statement keys.

Question 6

Define Indicator Species

Answer 6

Species that by their presence or absence indicate environmental quality/pollution levels.