Topic 3

Question 1

Allele

Answer 1

A variant of a gene

Question 2

Genotype

Answer 2

The alleles carried

Question 3

Phenotype

Answer 3

Physical traits

Question 4

Niche

Answer 4

Role of an organism within the habitat it lives in

Question 5

Species richness

Answer 5

Number of different species in an area

Question 6

Species abundance

Answer 6

Relative number of species in an area

Question 7

Conservation

Answer 7

Maintaining and protecting a living and changing environment

Question 8

Ex-situ conservation

Answer 8

Conservation of components of biological diversity outside their natural habitat

Question 9

In-situ conservation

Answer 9

Conservation of ecosystems and natural habitat and the maintenance and recovery of viable populations of species and their natural surroundings

Question 10

Evolution

Answer 10

Change in genetic composition of organisms over several generations as a result of natural selection

Question 11

Psychological adaptation

Answer 11

Adaptation involving the body of the organisms work including differences in biochemical pathways or enzymes

Question 12

Behavioural adaptation

Answer 12

Changes involving programs or instinctive behaviour making organisms better adapted for survival

Question 13

Anatomical adaptation

Answer 13

Adaptation involved in the form of the organism

Question 14

Gene

Answer 14

Sequence of bases of the DNA molecule

Question 15

Selection pressure

Answer 15

Pressure exerted by change environment or nation of population causing changes in population as a result of natural selection

Question 16

Specification

Answer 16

Formation of a new species

Question 17

Geographical isolation

Answer 17

Occurs with a physical barrier such as a river separating individuals from the original population

Question 18

Ecological Isolation

Answer 18

Population preferences for different parts of the same region
Ie :food less competition different altitudes

Question 19

SeasonalIsolation

Answer 19

Different mating times ,different pollination times which could be due to temperature light levels and food availability

Question 20

Behavioural isolation

Answer 20

Occurs in courtship rituals display of meeting patterns for sounds which could not be recognised by the other species

Question 21

Mechanical isolation

Answer 21

Change it impossible for them to meet or changes in the stigma in a statement and flowers making pollination unsuccessful

Question 22

Allopatric speciation

Answer 22

Physically or geographically separated

Question 23

Endemic

Answer 23

geographical isolation and is only found in 1 place

Question 24

Biodiversity

Answer 24

Measure of how varied an ecosystem is