NCERT Class 12 Biology Exemplar Chapter –7 Evolution Part 2
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Question 10:
Vivipary is considered to be more evolved because:
a. The young ones are left on their own
b. The young ones are protected by a thick shell
c. The young ones are protected inside the mother’s body and are looked after they are born leading to more chances of survival
d. The embryo takes a long time to develop
Answer: (c)
Question 11:
Fossils are generally found in:
a. Sedimentary rocks
b. Igneous rocks
c. Metamorphic rocks
d. Any type of rock
Answer: (a)
Question 12:
For the MN-blood group system, the frequencies of M and N alleles are and 0.3, respectively. The expected frequency of MN-blood group bearing organisms is likely to be
a.
b.
c.
d.
Answer: (a)
Question 13:
Which type of selection is industrial melanise observed in moth, Biston bitularia:
a. Stabilising
b. Directional
c. Disruptive
d. Artificial
Answer: (b)
Question 14:
The most accepted line of descent in human evolution is:
a. Australopithecus → Ramapithecus → Homo sapiens → homo habilis
b. Homo erectus → Homo habilis → Homo sapiens
c. Ramapithecus → Homo habilis → Homo erectus → Homo sapiens
d. Australopithecus → Ramapithecus → Homo erectus → Homo habilis → Homo sapiens.
Answer: (c)
Question 15:
Which of the following is an example for link species?
a. Lobe fish
b. Dodo bird
c. Sea weed
d. Tyrannosaurus rex
Answer: (a)
Question 16:
Match the scientists listed under column ‘A’ with ideas listed column ‘B’.
Column 1 | Column 2 | ||
i. | Darwin | M. | Abiogenesis |
ii. | Oparin | N. | Use and disuse of organs |
iii. | Lamarck | O. | Continental drift theory |
iv. | Wagner | P. | Evolution by natural selection |
a. i-M; ii-P; iii-N; iv-O
b. i-P; ii-M; iii-N; iv-O
c. i-N; ii-P; iii-O; iv-M
d. i-p; ii-O; iii-N; iv-M
Answer: (b)
Question 17:
In 1953 S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from pre-existing non-living organic molecules. The primitive earth conditions created include:
a. low temperature, volcanic storms, atmosphere rich in oxygen
b. low temperature, volcanic storms, reducing atmosphere
c. high temperature, volcanic storms, non-reducing atmosphere
d. high temperature, volcanic storms, reducing atmosphere containing etc.
Answer: (d)
Question 18:
Variations during mutations of meiotic recombination’s are:
a. random and directionless
b. random and directional
c. random and small
d. random, small and directional
Answer: (a)