NCERT Class-XII zoology Evolution NEET 2021,Biology MCQs,PDFs

Evolution Mock Exam-13

Question No:1

Disruptive selection _____.

[A] eliminates uncommon forms of alleles
[B] does not favour intermediate forms of a trait
[C] shifts allele frequencies in a steady, consistent direction
[D] all of the above



Question No:2

The processes of _____ and _____ generate variation and _____ produces adaptation to the environment.

[A] sexual selection, natural selection, mutation
[B] mutation, sexual recombination, genetic drift
[C] genetic drift, mutation, sexual recombination
[D] mutation, sexual recombination, natural selection



Question No:3

Industrial melanism was highlighted by:

[A] Polar bear
[B] Rock python
[C] Mimosa pudica
[D] Biston betularia



Question No:4

The phenomenon of ‘Industrial melanism’ demonstrates:

[A] Natural selection
[B] Induced mutation
[C] Reproductive isolation
[D] Geographical isolation



Question No:5

The change of the lighter coloured variety of peppered moth, Biston betularia, to its darker variety (carbonaria) is due to:

[A] Deletion of a segment of genes due to industrial pollution
[B] Mutation of single Mendelian gene for survival in smoke laden industrial environment
[C] Industrial carbon deposited on the wings of the moth resulting in darker variety
[D] Translocation of a block of genes in chromosomes in response to heavy carbons



Question No:6

Speciation usually occurs:

[A] Suddenly
[B] By genetic drift
[C] When populations are geographically isolated
[D] When populations are not geographically isolated



Question No:7

Which is basis of evolution?

[A] Cell
[B] Species
[C] Individual
[D] Population



Question No:8

The classical example of adaptive radiation in development of new species is:

[A] Darwin finches
[B] Marsupials of Australia
[C] Giant turtles
[D] All of these



Question No:9

The spread of genes from one breeding population to another by migration which may result in change in gene frequency is:

[A] Gene flow
[B] Genetic drift
[C] Gene frequency
[D] None of these



Question No:10

Arrange the periods of Palaeozoic era in ascending order in a geological time scale:

[A] Cambrian -> Ordovician -> Silurian -> Devonian -> Carboniferous —> Permian
[B] Cambrian -> Devonian —> Ordovician —> Silurian -> Carboniferous —> Permian
[C] Cambrian —> Ordovician —> Devonian —> Silurian —> Carboniferous —> Permian
[D] Silurian —> Devonian —> Cambrian -> Ordovician —> Permian —> Carboniferous



Question No:11

Presence of recessive trait is 6%. The frequency of dominant allele in population is:

[A] 0.6
[B] 0.32
[C] 0.84
[D] 0.92



Question No:12

Frequency of an autosomal lethal gene is The frequency of carrier in a population of 00 individual is:

[A] 72
[B] 96
[C] 104
[D] 36



Question No:13

Darwin’s finches are found in:

[A] Tahiti
[B] Tundra
[C] Galapagos Island
[D] None of these



Question No:14

In the developmental history of mammalian heart, it is observed that it passes through a two-chambered fishlike heart, three chambered frog-like heart and finally four-chambered stage. To which hypothesis can this above cited statement be approximated?

[A] Biogenetic law
[B] Lamarck’s principle
[C] Hardy-Weinberg law
[D] Mendelian principles



Question No:15

Darwin’s finches are an excellent example of:

[A] Connecting links
[B] Brood parasitism
[C] Adaptive radiation
[D] Seasonal migration