gr11 bio evolution

Question 0

Stabilizing selection

Answer 0

Selection against individuals exhibiting traits that deviate from the current population average.
Occurs when the average phenotype within a population is favoured by the environment

Question 1

Directional selection

Answer 1

Favours an increase or decrease in the value of a trait from the current population average

Question 2

Disruptive selection

Answer 2

Favours more variations of a trait that differ from the current population average.

Question 3

Sexual selection

Answer 3

The favouring of any trait that specifically enhances the mating success of an individual

Question 4

Genetic drift

Answer 4

The random shifting of the genetic makeup of the next generation. More pronounced in small populations. Can cause a particular allele to disappear or become extinct.

Question 5

Genetic bottlenecks

Answer 5

A dramatic often temporary reduction in population size, usually results in genetic drift

Question 6

Founder effect

Answer 6

Genetic drift that results when a small number of individuals separate from their original population and establish a new one.

Question 7

Homologous feature

Answer 7

Look alike but have different functions

Question 8

Analogous feature

Answer 8

Look different but serve the same functions

Question 9

Vestigial features

Answer 9

Have no purpose

Question 10

Micro evolution

Answer 10

Changes in the gene allele frequencies and phenotypic traits within a population and species

Question 11

Speciation

Answer 11

The formation of new species

Question 12

Behavioural isolation

Answer 12

Different species use different mating clues

Question 13

Temporal isolation

Answer 13

Different species breed at different times of the year

Question 14

Ecological isolation

Answer 14

Very similar species may occupy different habbitatas within a region

Question 15

Mechanical isolation

Answer 15

Differences in morphological features may take two species incompatible

Question 16

Gametic isolation

Answer 16

Male gametes may not be able to recognize and fertilize an egg of a different species.

Question 17

Zygote mortality

Answer 17

Mating is possible but genetic differences result in a zygote that is unable to develop properly. Zygote is not viable

Question 18

Hybrid inviability

Answer 18

A hybrid individual develops but dies before birth. Pregnancy ends in a miscarriage

Question 19

Hybrid infertility

Answer 19

Hybrid offspring remain healthy but are sterile

Question 20

Allopatric speciation

Answer 20

The formation of a new species as a result of evolutionary changes following a period of geographic isolation

Question 21

Sympatric speciation

Answer 21

The evolution of population as within the same geographic area into separate species

Question 22

Adaptive radiation

Answer 22

The rapid evolution of a single species into many new species

Question 23

Divergent evolution

Answer 23

The large scale evolution of a group into many different forms

Question 24

Convergent evolution

Answer 24

The evolution of similar traits in distantly related species. Occurs when two different species evolve to occupy similar ecological a niches.

Question 25

Coevolution

Answer 25

A process in which one species evolves in response to the evolution of another species .

Question 26

What are the levels of classification?

Answer 26

``` Kingdom Phylum Class Order Family Genus Species ```

Question 27

What are the 5 kingdoms?

Answer 27

``` Animal Plant Fungi Monetary Protista ```