CLASS 12 ZOOLOGY-THEORIES OF EVOLUTION

1.The book ‘Philosophie Zoologique’ was published by

A) Charles Darwin
B) August Weismann
C) Mc Dougall
D) Jean Baptiste de Lamarck

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ANSWER : D) Jean Baptiste de Lamarck

2.The German scientist who segregated germplasm from somatoplasm for the first time was

A) Lamarck
B) Malthus
C) Weismann
D) Hugo de vries

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ANSWER : C) Weismann

3.Mc Dougall supported neo-lamarckism and proved the concept of

A) Direct action of environment on organism
B) Learning is an acquired character
C) Speed of learning increased from generation to generation
D) All the above

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ANSWER : B) Learning is an acquired character

3.Darwin supported the following concepts for evolution

A) arrival of the fittest
B) survival of the fittest
C) The differentiation of somatoplasm germplasm
D) genetic recombinations

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ANSWER : B) survival of the fittest

5.The book “Process of organic evolution” to support modern synthetic theory of evolution was provided by......

A) Dobzhansky
B) G.L.Stebbins
C) Hardy-weinberg
D) Hugo de vries

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ANSWER : B) G.L.Stebbins

6.Who tried to prove that learning is an acquired character that can be inherited.

A) McDougall
B) Hardy-weinberg
C) Hugo de vries
D) Dobzhansky

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ANSWER : A) McDougall

7.The factor that enriches the genepool with new modified genes

A) mutation
B) somatic variation
C) decrease in chromosomes
D) increase in cytoplasm

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ANSWER : A) mutation

8.Temperature related changes in the body of mice was noted by

A) Dobzhansky
B) Hardy-weinberg
C) McDougall
D) F.B.Sumner

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ANSWER : D) F.B.Sumner

9.The book “Genetics and the Origin of species”was published by

A) Hardy-weinberg
B) F.B.Sumner
C) Dobzhansky
D) McDougall

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ANSWER : C) Dobzhansky

10.A classical example for such a polymorphism could be the existence of a genetic disorder in humans

A) sickle-cell anaemia
B) AIDS
C) cholera
D) rickets

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ANSWER : A) sickle-cell anaemia

11.Who developed the concept of Genetic drift .

A) Lamarck
B) Muller
C) Sewal Wright
D) G.H.Hardy

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ANSWER : C) Sewal Wright

12.The collection of genes in a population is referred to as

A) gene pool
B) gene therapy
C) mutation
D) gene pond

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ANSWER : A) gene pool

13..................are considered as the ‘raw materials’ for evolution.

A) gene mutation
B) gene therapy
C) ploidy
D) natural selection

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ANSWER : A) gene mutation

14.Prodigality of nature is otherwise called.................

A) natural selection
B) overproduction
C) struggle for existence
D) survival of the fittest

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ANSWER : B) overproduction

15.When the phenotypic features coincide with normal environmental situations, the selection is..

A) polymorphism
B) disruptive selection
C) directional selection
D) stabilizing selection

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ANSWER :D) stabilizing selection

16............operates in response to gradual changes in the environment.

A) polymorphism
B) disruptive selection
C) directional selection
D) stabilizing selection

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ANSWER : C) directional selection

17.The selection pressure may favour the existence of more than one phenotype in a population.

A) polymorphism
B) disruptive selection
C) directional selection
D) stabilizing selection

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ANSWER : B) disruptive selection

18.When a disruptive selection produces more than one phenotype within a population the phenomenon is

A) polymorphism
B) disruptive selection
C) directional selection
D) stabilizing selection

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ANSWER : A) polymorphism

19.The book “The Origin of species”was published by

A) Lamarck
B) Dobzhansky
C) Charles Robert Darwin
D) G.H.Hardy

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ANSWER : C) Charles Robert Darwin

20.Which disease reduces the oxygen-carrying capacity of the blood and affects blood supply.

A) sickle-cell anaemia
B) SCID
C) AIDS
D) malaria

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ANSWER : A) sickle-cell anaemia