Speciation, evolution and Distribution of plants

Question 1

Speciatin ways?

Answer 1

1. Gradual

2. abrupt

Question 2

types of speciation?

Answer 2

1. allopatric
2. peripatric
3. parapatric
4. sympatric
5. stasipatric

Question 3

Gradual speciation?

Answer 3

1. aka geographical speciation
2. species and its habitat expands and intrusion into adjoining areas
3. Intruders develop their own subpopulations amid already developed species of the adjoining areas, through selective influences of these newly developed subpopulation
4. these newly developed subspecies, isolated by distance factor from each other and from the parent species: this is called allopatric distribution which gives birth to new species because of geographical isolation
5. If new members of this newly developed species come back to the original place then the resultant distribution is called sympatric distribution. Though there is variation in the characteristics of the population of the original species of the initial Habitat and the populations of newly developed species but there is still some similarity between the initial populations of the original Habitat and emigrant and reinhabited members.