Gloassary Terms

Question 1

Pyramid of biomass

Answer 1

Diagram that shows the mass of each population in a food chain

Question 2

Nitrogen cycle

Answer 2

The recycling of nitrogen in the environment

Question 3

Interspecific competition?

Answer 3

Competition between individuals of different species

Question 4

Intraspecific competition?

Answer 4

Competition between individuals of the same species

Question 5

Spontaneous?

Answer 5

Something that happens without external stimulus

Question 6

Allele?

Answer 6

The form of a gene

Question 7

Continuous variation?

Answer 7

Variation that falls over a range of values e.g. height

Question 8

Discrete variation?

Answer 8

Variation that falls into distinct categories e.g. gender

Question 9

Selective pressure?

Answer 9

Factor that increase/decreases the survival of an individual with particular characteristics

Question 10

Gene pool?

Answer 10

All of the alleles present in a population

Question 11

DDT?

Answer 11

Insecticide originally used to kill mosquitoes, builds up in the food chain

Question 12

Indicator species?

Answer 12

Species that by its presence or absence indicates the level of pollution in the environment.

Question 13

Biomagnification?

Answer 13

The increase in a chemical concentration as you move up a food chain