Ecology

Question 1

Ecology

Answer 1

The study of the interactions between living things and between organisms and their environment.

Question 2

Biosphere

Answer 2

That part of the planet containing living organisms

Question 3

Ecosystem

Answer 3

A group of clearly distinguished organisms that interact with their environment as a unit.

Question 4

Habitat

Answer 4

The place where a plant or animal lives

Question 5

Population

Answer 5

All the members of the same species living in an area

Question 6

Community

Answer 6

All the different populations in an area

Question 7

Abiotic factors

Answer 7

Non living factors

Question 8

Biotic factors

Answer 8

Living factors

Question 9

Edaphic factors

Answer 9

Relate to soil

Question 10

Pyramid of numbers

Answer 10

Represents the number of organisms at each trophic level in a food chain

Question 11

Ecological niche

Answer 11

The functional role an organism place in the community

Question 12

Nutrient recycling

Answer 12

The way in which elements are exchanged between living and non-living components of an ecosystem.

Question 13

Nitrogen fixation

Answer 13

The conversion of nitrogen gas into ammonia or nitrate

Question 14

Nitrification

Answer 14

The conversion of ammonia and ammonium compounds to nitrite and then to nitrate.

Question 15

Denitrification

Answer 15

The conversion of nitrates to nitrogen gas

Question 16

Pollution

Answer 16

Any harmful additions o the environment

Question 17

Pollutants

Answer 17

Harmful additions to the environment

Question 18

Conservation

Answer 18

The wise management of the existing natural resources in an ecosystem in order to maintain a wide range of habitats and prevent the death and extinction of organisms

Question 19

Competition

Answer 19

Occurs when organisms actively struggle for a resource that is in short supply

Question 20

Intra-specific competition

Answer 20

Takes place between members of the same species

Question 21

Inter-specific competition

Answer 21

Occurs between members of different species

Question 22

Contest competition

Answer 22

There is an active physical struggle between two individual organisms where one wins.

Question 23

Scramble competition

Answer 23

Where all of the competing individuals get some of the resource

Question 24

Predation

Answer 24

The catching killing and eating of another organism

Question 25

Predator

Answer 25

An organism that catches,kills and eats another organism

Question 26

Prey

Answer 26

The organism that is eaten by the predator

Question 27

Parasitism

Answer 27

Occurs when two organisms of different species live in close association and one organism obtains it’s food from and to the disadvantage of the second organism.

Question 28

Symbiosis

Answer 28

Occurs when two organisms of different species live in close association and at least one of them benefits.

Question 29

Qualitative study

Answer 29

Records the presence or absence of organisms

Question 30

Quantitative study

Answer 30

Records the numbers of organisms that are present

Question 31

Key

Answer 31

Means of naming organisms by answering a series of questions with alternative answers

Question 32

Adaptation

Answer 32

Any alteration that improves an organisms chances of survival and reproduction

Question 33

Percentage cover

Answer 33

An estimate of the amount of ground in a quadratic covered by each species

Question 34

Frequency

Answer 34

The chance of finding a named species with any one throw of a quadrat