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Assertion Reason Test: Evolution


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20 Questions MCQ Test Additional Study Material for NEET | Assertion Reason Test: Evolution

Assertion Reason Test: Evolution for NEET 2022 is part of Additional Study Material for NEET preparation. The Assertion Reason Test: Evolution questions and answers have been prepared according to the NEET exam syllabus.The Assertion Reason Test: Evolution MCQs are made for NEET 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion Reason Test: Evolution below.
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Assertion Reason Test: Evolution - Question 1

A: During evolution, pouched mammals of Australia survived.

R: Due to lack of competition from any other mammal due to continental drift.

Detailed Solution for Assertion Reason Test: Evolution - Question 1 Continental drift resulted in isolation of pouched mammals in Australia

Assertion Reason Test: Evolution - Question 2

A: Mesozoic is the era of dinosaurs, but they suddenly disappeared from the earth.

R: Dinosaurs may have changed into birds, or climatic changes killed them.

Detailed Solution for Assertion Reason Test: Evolution - Question 2

Dinosaur’s extinction → possibly due to climatic change.

Assertion Reason Test: Evolution - Question 3

A: Mutations are non-directional.

R: Darwin’s small variations are directional.

Detailed Solution for Assertion Reason Test: Evolution - Question 3 Darwinian variations are small and directional.

Assertion Reason Test: Evolution - Question 4

A: During industrialisation dark-winged or melanised moths were more abundant.

R: They were able to camouflage themselves, hide in the background and survived.

Detailed Solution for Assertion Reason Test: Evolution - Question 4 Birds killed light winged moths because they were conspicuous.

Assertion Reason Test: Evolution - Question 5

A: Tyrannosaurus rex had fearsome dagger-like teeth.

R: Tyrannosaurus was the largest dinosaur depending upon herbs and shrubs.

Detailed Solution for Assertion Reason Test: Evolution - Question 5 Tyrannosaurus is carnivorous. It is the biggest flesh-eating dinosaur.

Assertion Reason Test: Evolution - Question 6

A: During evolution, the early time period was without an ozone layer.

R: Ozone layer absorbs U.V. rays to some extent.

Detailed Solution for Assertion Reason Test: Evolution - Question 6 Early time was without ozone. UV rays entered the atmosphere.

Assertion Reason Test: Evolution - Question 7

A: Theory of biogenesis explains that life arises from pre-existing life.

R: Louis Pasteur finally disapproved of the theory of spontaneous generation of life.

Detailed Solution for Assertion Reason Test: Evolution - Question 7 Louis Pasteur disproved the theory of spontaneous generation of life by swan-neck experiment.

Assertion Reason Test: Evolution - Question 8

A: India falls under oriental realm out of other biogeographical realms.

R: World is divided into six biogeographical realms.

Detailed Solution for Assertion Reason Test: Evolution - Question 8 Oriental, Nearctic, Ethiopian, Australian, Palaearctic, Neotropical are six biogeographical realms.

Assertion Reason Test: Evolution - Question 9

A: Archaeopteryx had free caudal vertebrae and toothed beak with teeth like reptiles.

R: It is missing the link between reptiles and birds.

Detailed Solution for Assertion Reason Test: Evolution - Question 9

Missing link → extinct connecting link.

Assertion Reason Test: Evolution - Question 10

A: Placental wolf and Tasmanian wolf (a marsupial) show convergent evolution.

R: Like marsupials, placental mammals in other parts of the world also exhibit adaptive radiation in evolving into varieties of such placental mammals, each of which appears to be similar to a corresponding marsupial.

Detailed Solution for Assertion Reason Test: Evolution - Question 10 When more than one adaptive radiation has occurred in an isolated geographical area (representing different habitat) one may call it convergent evolution.

Assertion Reason Test: Evolution - Question 11

A: There is 99% homology in the haemoglobin of man and Gorilla.

R: Modern man is a direct descendent of Gorilla.

Detailed Solution for Assertion Reason Test: Evolution - Question 11 Cro-Magnon man is regarded as the most recent ancestor of today's man.

Assertion Reason Test: Evolution - Question 12

A: Many countries have banned the use of antibiotics in the cattle feed.

R: Dairymen give antibiotics in the feed to the cattle, and it becomes breeding grounds for the antibiotic-resistant bacteria.

Detailed Solution for Assertion Reason Test: Evolution - Question 12 Diseases will not be cured by using the same antibiotic later.

Assertion Reason Test: Evolution - Question 13

A: Lycaenops is a connecting link between reptiles and mammals.

R: In the Permian period there was the origin of mammal-like reptiles.

Detailed Solution for Assertion Reason Test: Evolution - Question 13 Permian period is a part of palaeozoic era.

Assertion Reason Test: Evolution - Question 14

A: Blood group analysis shows human beings are more closely related to apes than to monkeys.

R: The blood groups A and B are found in apes, but not in monkeys.

Detailed Solution for Assertion Reason Test: Evolution - Question 14 Man and apes have common ancestors.

Assertion Reason Test: Evolution - Question 15

A: Due to bottleneck effect, among the survivors, certain alleles may be over-represented, some may be underrepresented, and some alleles may be totally eliminated.

R: The path of extinction of a species cannot be reversed due to bottleneck effect.

Detailed Solution for Assertion Reason Test: Evolution - Question 15 Bottleneck effect is the decrease in the genetic variability in a population, e.g., cheetah population.

Assertion Reason Test: Evolution - Question 16

A: Spotted cuscus and marsupial mole are examples of marsupial radiation.

R: Both are found in Australian region.

Detailed Solution for Assertion Reason Test: Evolution - Question 16 Australian marsupials exhibit adaptive radiation.

Assertion Reason Test: Evolution - Question 17

A: Similarities in proteins and genes performing a given function among diverse organisms give clues to common ancestry.

R: All the group of vertebrates arises from the common ancestor with great adaptation capability.

Detailed Solution for Assertion Reason Test: Evolution - Question 17 Genetic similarities are most accurate to compare organisms.

Assertion Reason Test: Evolution - Question 18

A: Sometimes, some babies have a small tail.

R: This is just a type of mutant variety.

Detailed Solution for Assertion Reason Test: Evolution - Question 18

This is atavism → unusual occurrence of the ancestral trait.

Assertion Reason Test: Evolution - Question 19

A: Muscles of external ears are fully developed in humans.

R: These muscles help in moving ear pinna in humans.

Detailed Solution for Assertion Reason Test: Evolution - Question 19 These muscles are vestigial in humans.

Assertion Reason Test: Evolution - Question 20

A: A single large mutation called saltation can produce new species.

R: Mutations are directional.

Detailed Solution for Assertion Reason Test: Evolution - Question 20 Mutations are non-directional.
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