111. Who gave evolutionary concept of determinants ?
112. Darwin’s theory of natural selection is objected, because it
A. stresses upon slow and small variations
B. explains the adaption of certain inherited characters
C. stresses on interspecific competition
D. explains that natural calamities take a heavy annual toll of lives
Answer : Option B
Given : 1 = natural selection ; 2 = variations and their inheritance ; 3 = survival of the fittest ; 4 =
struggle for existence. According to Darwinism, which of the following represents the correct sequence
of events in the origin of new species
114. Theory of Lamarck was based on
A. adaptive collisions
B. adaptive rediations
C. adaptive modifications
D. none of these
Answer : Option B
115. Darwin’s natural selection is based on
A. variations
B. prodigality, struggle for existence, survival of fittest
C. law of use and disuse
D. law of inheritance of acquired characters
Answer : Option A
116. Industrial melanism is an example of
A. natural selection
B. mutation
C. adaptive convergence
D. artificial selection
Answer : Option C
117. Which statement is correct ?
A. Lamarck theory – Struggle for existence
B. Darwin theory – Use and disuse of organ
C. Biogentic law – Recapitulation theory
D. Lamarck theory – Theory of continuity of germplasm
Answer : Option C
Match the correct set.
Column I Column II
I. Modified form of Lamarckism A. G.L. Stebbins (1950)
II. Variation and evolution in plants B. Neo- Lamarckism
III. Germinal selection theory C. Etienne Geoffroy
IV. Supporter of Lamarck’s theory D. August Welsmann
A. I – A, II – B, III – C, IV – D
B. I – D, II – B, III – C, IV – A
C. I – A, II – B, III – D, IV – C
D. I – D, II – A, III – C, IV – B
Answer : Option C
A. Mutations occurring in the germinal cells of the gonads are called germs mutations.
R. They are heritable raw materials for natural selection lead to origin of new species.
A. If A and R both are true and R is correct explanation of A
B. If A and R both are true but R is not correct explanation of A
C. If A is true and R is wrong
D. If A is wrong and R is true
Answer : Option A
A All the finchesn the Galapagos Islands descended from common ancestor. R. They show variations only in their beaks as they got adapted to different feeding habits
A. If A and R both are true and R is correct explanation of A
B. If A and R both are true but R is not correct explanation of A
C. If A is true and R is wrong
D. If A is wrong and R is true
Answer : Option B