Sexual dimorphism (SD) is a pattern that is seen throughout the animal kingdom and differences between the sexes in coloration are common in many organisms. Following some statement are given

A) There are many mechanisms that drive the evolution of SD, the most accepted mechanism being sexual selection

B) Mate choice is an important proximate mechanism of sexual selection, often the sex with the higher reproductive investment is the ‘choosy’ sex

C) Larger species are more sexually dimorphic than smaller species

D) Terrestrial species tend to be more sexually dimorphic than arboreal species

Which of the following above statement is correct?

Which one of the following is correct?

#Question id: 10754

#Section 2: Evolution

Following is different type of interaction was shown in figure. (+: Benefit , - Harm , 0= Neither benefit nor harm) What is interaction between column A & B in each schematic?

#Question id: 10755

#Section 2: Evolution

For two species A and B in competition, the carrying capacities, competition coefficients, per capita growth rate and population size are

KA = 1000          KB = 1200        α= .5    r A= .3    N1= 500         N2= 200          

According to the Lotka-Volterra model, what is growth rate of species A?

#Question id: 10814

#Section 2: Evolution

A Population of N1 species is growing with N2 species with a growth rate (r1) of 0.15 in an environment with a carrying capacity K1 of 400, Density of N1 species 100, density of N2 species 50 competitive efficiency of N2 on N1 species 1.5. What is the approximate growth rate N1 species?

#Question id: 10815

#Section 2: Evolution

The evolution of two interacting species in a community is referred to as ________________.

#Question id: 10816

#Section 2: Evolution

When a harmless species takes advantage by resembling the aposematic coloration of other species that are toxic, it is called _____________________.

#Question id: 10817

#Section 2: Evolution

Removal of a __________________ from a community affects community structure significantly.