Q. No.The following two plants exhibit :
1. Analogous organs
2. Vestigial organs
3. Rudimentary organs
4. Homologous organs
In the apparatus of Urey and Miller experiment, the gases [G] contained in the flask are :
1. Methane, Carbon dioxide, Ammonia and Water vapour
2. Methane, Hydrogen cyanide, Ammonia and Water vapour
3. Methane, Ammonia, Hydrogen and Water vapour
4. Carbon dioxide, Oxygen, hydrogen and ammonia
Lamarck's theory of evolution is also called
1. Theory of special creation
2. Inheritance of acquired characters
3. Survival of the fittest
4. None of these
Industrial melanism is an example of
(1) Neo Darwinism
(2) Natural selection
(3) Mutation
(4) Neo Lamarckism
Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism?
(1) Transduction
(2) Chromosomal aberrations
(3) Genetic drift
(4) Recombination
What is common to whale, seal and shark?
(1) Seasonal migration
(2) Thick subcutaneous fat
(3) Convergent evolution
(4) Homeothermy
Artificial selection to obtain cows yielding high milk output represents
| 1. | Stabilising selection as it stabilizes this character in the population |
| 2. | Directional as it pushes the mean of the character in one direction |
| 3. | Disruptive as it spills the population into two, one yielding higher output and the other lower output |
| 4. | Stabilizing followed by disruptive as it stabilizes the population of producing higher yielding cows |
In Hardy- Weinberg equation, the frequency of heterozygous individual is represented by
(1) P2
(2) 2pq
(3) pq
(4) q2
Which of the following is the correct sequence of events in the origin of life?
I. Formation of protobionts,
II. Synthesis of organic monomers.
III. Synthesis of organic polymers.
IV. Formation of DNA-based genetic systems.
(1) I,II,III,IV
(2) I,III,II,IV
(3) II,III,I,IV
(4) II,III,IV,I
Analogous structures are a result of
(1) Convergent evolution
(2) shared ancestry
(3) stabilising selection
(4) divergent evolution
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