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Q. No.The theory of spontaneous generation states that.
1. Life arose from living form only.
2. Life can arise from both living and non-living.
3. Life can arise from non-living things only.
4. Life arises spontaneously, neither from the living and nor from non-living.
Subtopic: Other Theories of Origin of Life |
68%
From NCERT
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\((p+q)^2=p^2+2 p q+q^2=1\) represents an equation used in
1. Population genetics.
2. Mendelian genetics.
3. Biometrics.
4. Molecular genetics.
Subtopic: Hardy Weinberg Law |
85%
From NCERT
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In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by:
1.q2
2. p2
3. 2pq
4. pq
1.q2
2. p2
3. 2pq
4. pq
Subtopic: Hardy Weinberg Law: 1 |
91%
From NCERT
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Match each item in Column I with one In Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A | Homo habilis | P | More ape like |
| B | Homo erectus | Q | More man like |
| C | Dryopithecus | R | Probably did not eat meat. |
| D | Ramapitehcus | S | Probably ate meat. |
Codes:
| A | B | C | D | |
| 1. | R | S | P | Q |
| 2. | S | R | P | Q |
| 3. | S | R | Q | P |
| 4. | R | S | Q | P |
Subtopic: Evolution Prior to Ape Man |
85%
From NCERT
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Consider the given two statements:
| Assertion(A): | Pouched mammals survived in the continent of Australia. |
| Reason(R): | Due to continental drift, pouched mammals of Australia did not face competition from any other mammals. |
| 1. | (A) is false but (R) is true |
| 2. | (A) is true but (R) is false |
| 3. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| 4. | Both (A) and (R) are true but (R) is not the correct explanation of (A) |
Subtopic: Difference Between Drift & Selection |
86%
From NCERT
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About 65 mya, the dinosaurs suddenly disappeared from the earth. The reason for their sudden disappearance may be:
(a) Climatic changes killed them.
(b) Most of them evolved into birds.
1. Only (a)
2. Only (b)
3. The truth may live in between (a) and (b).
4. Neither (a) nor (b).
(a) Climatic changes killed them.
(b) Most of them evolved into birds.
1. Only (a)
2. Only (b)
3. The truth may live in between (a) and (b).
4. Neither (a) nor (b).
Subtopic: A BRIEF ACCOUNT OF EVOLUTION |
86%
From NCERT
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Ichthyosaur was:
1. a marine retile
2. a marine amphibian
3. a fresh water amphibian
4. a flying reptile
1. a marine retile
2. a marine amphibian
3. a fresh water amphibian
4. a flying reptile
Subtopic: A BRIEF ACCOUNT OF EVOLUTION |
56%
From NCERT
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Most common component of coal-forming ecosystems from the Carboniferous and Permian periods were:
1. Algae and protists
2. Ferns
3. Angisosperms
4. Animals
1. Algae and protists
2. Ferns
3. Angisosperms
4. Animals
Subtopic: A BRIEF ACCOUNT OF EVOLUTION |
79%
From NCERT
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How many of the given statements are correct regarding the timeline of evolution of different life forms on Earth?
1. 3
2. 4
3. 5
4. 6
| I: | By the time of 500 mya, invertebrates were formed and active. |
| II: | Jawless fish probably evolved around 350 mya. |
| III: | Sea weeds and few plants existed probably around 320 mya. |
| IV: | The first organisms that invaded land were plants. |
| V: | Lobefins evolved into the first amphibians. |
| VI: | The amphibians evolved into reptiles. |
1. 3
2. 4
3. 5
4. 6
Subtopic: Evolution Prior to Ape Man: 1 |
77%
From NCERT
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Consider the given two statements:
| Assertion: | Unlike amphibians, reptiles were truly successful on land. |
| Reason: | Unlike amphibians, reptiles lay thick-shelled eggs which do not dry up in sun. |
| 1. | (A) is false but (R) is true |
| 2. | (A) is true but (R) is false |
| 3. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| 4. | Both (A) and (R) are true but (R) is not the correct explanation of (A) |
Subtopic: A BRIEF ACCOUNT OF EVOLUTION |
78%
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