Speciation in ancestor as following way

A- Non-swimming populations separated by a river may gradually diverge because there is no gene flow between them

B- Plants commonly exhibit polyploidy, meaning they contain three or more sets of chromosomes

C- The tendency for two species to diverge in morphology and thus resource use because of competition

Which of the following above condition allowed to which type of speciation?

#Question id: 10622

#Section 2: Evolution

For a species having logistic growth, if K = 4000 and r = 0.25, the maximum growth rate will be

#Question id: 10623

#Section 2: Evolution

What is the population growth per unit of time when r = 0.50, N = 100 and K = 1000. What is value of per capita growth rate when population growing at maximum rate?

#Question id: 10624

#Section 2: Evolution

Limited resources cause tradeoff between investment in reproduction and survival. There is two Animal species with similar size present at same habitat but different their life history as a following. 

A Species   -   Later age at first reproduction

B Species –    Large clutch size and low survival of offspring and adult

There is above species should be

#Question id: 10625

#Section 2: Evolution

#Question id: 10626

#Section 2: Evolution

Following is a hypothetical life table of species.

Following some statement is given

A- Proportional of survive is constant over different age group

B- Greater mortality in young age

C. Follow type II survivorship curve

D. Follow type III survivorship curve

Which of the following above statement is correct?

#Question id: 10627

#Section 2: Evolution

Following graph represent mortality rate of population of species A, B and C with their respective Age

There are following organism are correct