CBSE zoology Evolution NEET 2021 online exam,Biology MCQs,PDFs

Evolution Mock Exam-15

Question No:1

Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements. Statements:
(A) Wings of butterfly and birds look alike and are the results of ___ evolution
(B) Miller showed that CH, H, NH and __ when exposed to electric discharge in a flask resulted in formation of ___.
(C) Vermiform appendix is a __ organ and are __ evidence of evolution.
(D) According to Darwin evolution took place due to __ and __ of the fittest.

[A] (D) – (i) small variations, (ii) survival, – (i) convergent
[B] (A) – (i) convergent, – (i) oxygen, (ii) nucleosides
[C] (B) – (i) water vapour, (ii) amino acids – rudimentary, (ii) anatomical
[D] (C) — (i) vestigial, (ii) anatomical – (i) mutations, (ii) multiplication



Question No:2

Darwin’s finches are a good example of

[A] Industrial melanism
[B] Connecting link
[C] Adaptive radiation
[D] Convergent evolution



Question No:3

What was the most significant trend in the evolution of modem man (Homo sapiens) from his ancestors?

[A] Shortening of jaws
[B] Binocular vision
[C] Increasing brain capacity
[D] Upright posture



Question No:4

Mutations can be induced with:

[A] IAA
[B] Ethylene
[C] Gamma radiations
[D] Infra red radiations



Question No:5

Sweet potato is homologous to

[A] Potato
[B] Colocasia
[C] Ginger
[D] Turnip



Question No:6

The idea of mutations was brought forth by:

[A] Gregor Mendel, who worked on pisum sativum
[B] Hardy Weinberg, who worked on allele frequencies in a population
[C] Charles Darwin, who observed a wide variety of organisms during sea voyage
[D] Hugo de Vries, who worked on evening primrose



Question No:7

Which one of the following sets of items in the option – are correctly categorized with one exception hi it?
Items— Category —– Exception

[A] Kangaroo, Koala, Wombat Australian marsupials Wombat
[B] Plasmodium, Cuscuta, Trypanosoma Protozoan parasites Cusscuta
[C] Typhoid, Pneumonia, Diphtheria Bacterial diseases Diphtheria
[D] UAA,UAG, UGA Stop codons UAG



Question No:8

Which one of the following is a wrong statement regarding mutations?

[A] Cancer cells commonly show chromosomal aberrations
[B] UV and Gamma rays are mutagens
[C] Change in a single base pair of DNA does not cause mutation
[D] Deletion and insertion of base pairs cause frame-shift mutations



Question No:9

Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as:

[A] Adaptive radiation
[B] Natural selection
[C] Migration
[D] Divergent evolution



Question No:10

Which one of the following options gives one correct example each of convergent evolution and divergent evolution?
Convergent evolution—- Divergent evolution

[A] Eyes of octopus and mammals Bones of forelimbs of vertebrates
[B] Thorns of bougainvillea cucurbita Wings of butterflies and birds
[C] Bones of forelimbs if vertebrates Wings of butterfly and birds
[D] Thorns of bougainvillea and tendrils of cucurbita Eyes of octopus and mammals



Question No:11

What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?

[A] Shortening of jaws
[B] Binocular vision
[C] Increasing cranial capacity
[D] Upright posture



Question No:12

The extinct human who lived ,00,000 to 0,000 years ago, in Europe, Asia and parts of Africa, with short stature, heavy eye brows, retreating for heads, large jaws with heavy teeth, stocky bodies, a lumbering gait and stooped posture was:

[A] Homo hibilis
[B] Neanderthal human
[C] Cro-magnan human
[D] Ramapithecus



Question No:13

The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge, is called:

[A] Natural selection
[B] Convergent evolution
[C] Non-random evolution
[D] Adaptive radiation



Question No:14

The tendency of population to remain in genetic equilibrium may be disturbed by:

[A] Random mating
[B] Lack of migration
[C] Lack of mutations
[D] Lack of random mating



Question No:15

The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of:

[A] Homologous organs that have evolved due to convergent evolution
[B] Homologous organs that have evolved due to divergent evolution
[C] Analogous organs that have evolved due to convergent evolution
[D] Analogous organs that have evolved due to divergent evolution



Question No:16

According to Darwin, the organic evolution is due to:

[A] Intra specific competition
[B] Inter specific competition
[C] Competition within closely related species
[D] Reduced feeding efficiency in one species due to the presence of interfering species.



Question No:17

Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and forelimb of bats used in flying are an example of:

[A] Analogous organs
[B] Adaptive radiation
[C] Homologous organs
[D] Convergent evolution



Question No:18

Which one of the following are analogous structures?

[A] Wings of Bat and Wings of Pigeon
[B] Gills of Prawn and Lungs of Man
[C] Thorns of Bougainvillea and Tendrils of Cucurbita
[D] Flippers of Dolphin and Legs of Horse



Question No:19

Which is the most common mechanism of genetic variation in the population of the sexually reproducing organism?

[A] Transduction
[B] Chromosomal aberrations
[C] Genetic drift
[D] Recombination



Question No:20

Which of the following had the smallest brain capacity?

[A] Homo erectus
[B] Homo sapiens
[C] Homo neanderthalensis
[D] Homo habilis



Question No:21

A population will not exist in Hardy-Weinberg equilibrium if:

[A] Individuals mate selectively
[B] There are no mutations
[C] There is no migration
[D] The population is large



Question No:22

Industrial melanism is an example of:

[A] Natural selection
[B] Mutation
[C] Leo Lamarckism
[D] Neo Darwinism



Question No:23

The wings of a bird and the wings of an insect are:

[A] Analogous structures and represent convergent evolution
[B] Phylogenetic structures and represent divergent evolution
[C] Homologous structures and represent convergent evolution
[D] Homologous structures and represent divergent evolution