Speciation

Question 1

Role of speciation

Answer 1

Prevent interbreeding

Question 2

Allopatric

Answer 2

Population becomes divided by barrier caused by formation of river or mountain

Question 3

Peripatric

Answer 3

New species formed from a small population isolated at the edge of a larger population

Question 4

Parapatric

Answer 4

Population divided by localized selection pressure usually occurring in plants

Question 5

Sympatric

Answer 5

Same species evolve into separate species without any geographical separation.

Question 6

Prezygotic barriers

Answer 6

Prevents mating between two species

Question 7

Habitat isolation

Answer 7

Two species living in separate places so egg and sperm can’t come into contact

Question 8

Behavioural isolation

Answer 8

Different mating rituals

Question 9

Temporal isolation

Answer 9

individuals of two populations mating at different times usually occur in plants to prevent cross pollination

Question 10

Mechanical isolation

Answer 10

Individuals of two species can’t interbreed because of difference in size

Question 11

Gametic isolation

Answer 11

Different molecule levels

Question 12

Post zygotes barriers

Answer 12

Prevents zygote from becoming viable

Question 13

Zygotic mortality

Answer 13

Hybrid embryo doesn’t develop to maturity

Question 14

Zygotic in viability

Answer 14

Hybrid born with reduced life span and fitness level

Question 15

Zygotic infertility

Answer 15

Hybrid born strong but cannot reproduce