Speciation

Question 1

Speciation

Answer 1

Formation of new species

Question 2

Transformation

Answer 2

A new species gradually develops as a result of mutation and adaptation to changing environmental conditions and the old species is entirely replaced

Question 3

Divergence

Answer 3

One or more species arise from a parent species, the parent species continues to exist

Question 4

Adaptive radiation

Answer 4

The diversification of a common ancestral species into a variety of species, all of which being differently adapted

Eg. Darwins finches

Question 5

Allopatric speciation

Answer 5

(Geographical isolation)l occurs when populations of a species are separated by a physical barrier

Eg. River or mountain range
- separation means there is no mating between the two new populations

Question 6

Reproductive isolation

Answer 6

Evolution of mating location, time, or rituals, lack of reproductive fit, or offspring unviable or sterile

Question 7

Sympatric speciation

Answer 7

(No geographical isolation): occurs without a physical barrier to mating
- mutations leading to chromosome number changes in plants

Question 8

Gradualism

Answer 8

Gradual changes occurs steadily in a linear fashion

Question 9

Punctuation equilibrium

Answer 9

Evolutionary history consists of long periods of equilibrium where there is little change, interrupted by periods of speciation