Q. No.Both Charles Darwin and A.R.Wallace were influenced by the:
1. writings of J.B.S.Haldane on the origin of life
2. findings of Urey and Miller experiments
3. findings on the Galapagos Islands
4. essay on human population by T.R.Malthus
1. writings of J.B.S.Haldane on the origin of life
2. findings of Urey and Miller experiments
3. findings on the Galapagos Islands
4. essay on human population by T.R.Malthus
Which of the following pairs of organs do not represent analogous organs?
1. Eye of an octopus and eye of a mammal
2. Flippers of penguin and flippers of dolphin
3. Wings of bat and forelimbs of humans
4. Wings of birds and wings of butterfly
What decides the frequency of an allele in a
population?
1. Dominance
2. Its location on a particular chromosome
3. Its degree of expression
4. Natural selection
For the stability of the organic compounds, Oparin opined that probably:
1. UV radiation never reached the surface of the primeval Earth
2. the primitive Earth was in a molten state
3. the primitive Earth atmosphere was reducing rather than oxidizing
4. plenty of energy sources were available for chemical reactions to occur
According to Darwin, the organic evolution is due to
(1) Interspecific competition
(2) Competition within closely related species
(3) Reduced feeding efficiency in one species due to the presence of interfering species
(4) Intraspecific competition
According to Darwin, the organic evolution is due to
(1) Interspecific competition
(2) Competition within closely related species
(3) Reduced feeding efficiency in one species due to the presence of interfering species
(4) Intraspecific competition
Match the hominids with their correct brain size:
| Column-I | Column-II | ||
| (a) | Homo habilis | (i) | 900 cc |
| (b) | Homo neanderthalensis | (ii) | 1350 cc |
| (c) | Homo erectus | (iii) | 650-800 cc |
| (d) | Homo sapiens | (iv) | 1400 cc |
Select the correct option.
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iv) | (iii) | (i) | (ii) |
| 2. | (iv) | (i) | (iv) | (ii) |
| 3. | (iii) | (ii) | (i) | (iv) |
| 4. | (iii) | (iv) | (i) | (ii) |
In a species, the weight of a newborn ranges from 2 to 5 kg. 97% of the newborns with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 kg to 5 kg die. Which type of selection process is taking place?
1. Cyclical selection
2. Directional selection
3. Stabilizing selection
4. Disruptive selection
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
| 1. | 0.16 (AA); 0.36 (Aa); 0.48 (aa) |
| 2. | 0.36 (AA); 0.48 (Aa); 0.16 (aa) |
| 3. | 0.16 (AA); 0.24 (Aa); 0.36 (aa) |
| 4. | 0.16 (AA); 0.48 (Aa); 0.36 (aa) |
Variations caused by mutation, as proposed by Hugo de Vries, are:
1. small and directionless
2. random and directional
3. random and directionless
4. small and directional
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