Ecosystems

Question 1

Ecosystem is

Answer 1

All the organisms living in a community plus all the abiotic conditions in the area in which they live

Question 2

Habitat is

Answer 2

Place where an organism lived within an ecosystem

Question 3

Niche is

Answer 3

Roles of a species within its habitat

Question 4

What happens if two species try to occupy the same niche

Answer 4

Compete with one another. One species will be more successful than the other so only one species survives

Question 5

Adaptation is

Answer 5

Feature that members of species have that increases the chance of survival and reproduction

Question 6

Adaptation features can be

Answer 6

Physiological
Behavioural
Anatomical

Question 7

Natural selection

Answer 7

Organisms with better adaptations are more likely to survive reproduced and pass on the advantageous alleles that determines these adaptations. This increases he frequency of these alleles in the population which means the adaptations become more common

Question 8

Population is

Answer 8

All the species organisms of one species in a habitat

Question 9

Community is

Answer 9

Populations of different species in a habitat

Question 10

Population size is

Answer 10

Total number of organisms of one species in a habitat

Question 11

Carrying capacity is

Answer 11

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

Question 12

Abundance is

Answer 12

Number of individuals of one species in a particular area

Question 13

Frequency is

Answer 13

Number of samples a species is recorded in

Question 14

Percentage cover is

Answer 14

How much of the area you’re investigating is covered by a species

Question 15

Distribution is

Answer 15

Where a particular species is within the area you’re investigating

Question 16

Explain mark release recapture

Answer 16

Capture sample of species
Mark them harmlessly
Release
She second sample
Count how many marked

Question 17

Mark release recapture

Answer 17

Total population = (number of organisms in 1st sample caught x number of organisms in 2nd sample caught)/number marked in 2nd sample