1. Forelimbs of man, bat and cheetah
2. Heart of bat, man and cheetah
3. Brain of bat, man and cheetah
4. Eye of octopus, bat and man
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
Artificial selection to obtain cows yielding higher milk output represents:
1. Directional, as it pushes the mean of the character in one direction
2. Disruptive, as it splits the population into two, one yielding output and the other lower output
3. Stabilizing followed by disruptive, as it stabilizes the population to produce higher yielding cows
4. Stabilizing selection, as it stabilizes this character in the population
In Hardy- Weinberg equation, the frequency of heterozygous individual is represented by
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.
Analogous structures are a result of
(1) Convergent evolution
(2) shared ancestry
(3) stabilising selection
(4) divergent evolution
Which of the following structures is homologous to the wing of a bird?
(1) Wing of a moth
(2) Hind limb of rabbit
(3) Flipper of whale
(4) Dorsal fin of a shark
Following are the two statements regarding the origin of life
I. The earliest organisms that appeared on the earth were non-green presumably
II. The first autotrophic organisms were the chemoautotrophs that never released
Of the above statements which one of the following options is correct?
1. II is correct but I is false
2. Both I and II are correct
3. Both I and II are false
4. I is correct but II is false