Genetics and Populations - Populations in Ecosystems: Key Terms

Question 1

Abiotic

Answer 1

Ecological factor making up part of the non-biological environment of an organism

Question 2

Adaptation

Answer 2

Alterations in pattern or structure resulting from natural selection that allow the organism to be fitter

Question 3

Belt transect

Answer 3

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Question 4

Biodiversity

Answer 4

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Question 5

Biomass

Answer 5

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Question 6

Biotic

Answer 6

Ecological factor making up part of the biological environment of an organism

Question 7

Carrying capacity

Answer 7

The maximum stable population size of a species that an ecosystem can support

Question 8

Climax community

Answer 8

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Question 9

Community

Answer 9

All the living organisms in an ecosystem at a given time

Question 10

Conservation

Answer 10

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Question 11

Ecosystem

Answer 11

All the living and non-living components of a particular area

Question 12

Environment

Answer 12

Natural biological factors that affect life in a particular place and time

Question 13

Habitat

Answer 13

Where an organism normally lives, characterised by the physical conditions (abiotic factors) and other organisms present

Question 14

Index of diversity

Answer 14

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Question 15

Interspecific competition

Answer 15

Competition between organisms of different species

Question 16

Intraspecific competition

Answer 16

Competition between organisms of the same species

Question 17

Mark-release-recapture

Answer 17

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Question 18

Niche

Answer 18

How an organism fits into its environment. What a species is like, where it occurs, what it eats and its interactions with other species. Only one species can occupy a given niche at a particular time.

Question 19

Pioneer species

Answer 19

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Question 20

Population

Answer 20

Group of individuals of the same species that occupy the same habitat at the same time

Question 21

Primary succession

Answer 21

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Question 22

Quadrat

Answer 22

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Question 23

Species richness

Answer 23

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Question 24

Non-motile organism

Answer 24

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Question 25

Ecology

Answer 25

The study of organisms and their interaction with the environment

Question 26

Predation

Answer 26

Where an organism kills and eats another organism