In a bird species A, the male alone builds the nest, incubates the eggs and feeds the nestling. In bird species B, it is the female that does all that. In bird species C, both sexes contribute equally to the above activities. In species A and B, the uninvolved partner may fly away and mate again. Which sex among A, B and C is most likely to develop colorful plumage during breeding season?

#Question id: 3408

#Section 2: Evolution

New species originated via punctuated equilibrium having some characterstic feature

a. occur during cladogenesis from ancestral species

b. subpopulation of ancestral species transform in to new species

c. Morphological change is sudden and rapid

d. continuously change in their morphology

which above statement is correct

#Question id: 3407

#Section 2: Evolution

Natural selection can act in three main ways on a character, such as body size, that is continuously distributed. Following graph represent fitness and their relative body size after the exposure of natural selection at different way? Which of the above population influence to which type of natural selection?

#Question id: 3405

#Section 2: Evolution

Phylogenies can be used to test whether speciation has been sympatric or allopatric. Following figure shown a new species arises by allopatric speciation, its nearest relative will usually live in a different geographic area, such as in a nearby lake. Which of the following phylogenetic tree is correct?

#Question id: 3404

#Section 2: Evolution

A graph shows the frequency distribution of the character (body size). B graph shows the relation between body size and fitness, within one generation, and the third the expected change in the average for the character over many generations (if body size is inherited). Which of the following correct figure for Average size with respect to time?

#Question id: 3400

#Section 2: Evolution

Which of the following influence effective population size?

a. Sex ratio

b. variation between individuals in reproductive success

c. Fluctuations in population size

d. Small breeding group

#Question id: 3394

#Section 2: Evolution

All genetic drift arises from sampling error.  There are several different ways in which sampling error can arise as a following

a. Reduced population size      b. Founder effect

c. Genetic bottleneck                d. Differ in sex ratio

Which of the following above way cause sampling error in succeed generation?