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Q. No.Which of the following statements is not true?
1.
Flippers of penguins and dolphins are a pair of homologous organs.
2.
Analogous structures are a result of convergent evolution.
3.
Sweet potato and potato is an example of analogy.
4.
Homology indicates common ancestry.
Subtopic: Concept of Organic Evolution: Evidence: 1 |
83%
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NEET - 2022
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Genetic Drift occurs due to :
1. Natural selection
2. Sudden population migration
3. Continuous gene migration
4. Mutation
Subtopic: Hardy Weinberg Law: 1 |
62%
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NEET - 2022
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Select the correct match regarding adaptive radiation of Australian marsupials corresponding to placental mammals
1. Numbat-Flying Squirrel
2. Tasmanian Wolf - Bobcat
3. Marsupial mouse- Mole
4. Spotted Cuscus - Lemur
Subtopic: Concept of Organic Evolution: Evidence |
69%
From NCERT
NEET - 2022
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Speciation occurs most frequently is populations that are
| 1. | Sympatric |
| 2. | Undergoing disruptive selection |
| 3. | Allopatric |
| 4. | Not geographically separated |
Subtopic: Concept of Speciation |
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| Assertion(A): | Analogous structures are a result of convergent evolution |
| Reason(R): | More than one adaptive radiation appeared to have occurred in an isolated geographical area, is the convergent evolution |
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
| 1. | Both (A) & (R) are true and (R) is the correct explanation of (A) |
| 2. | Both (A) & (R) are true but (R) is not the correct explanation of (A) |
| 3. | (A) is true but (R) is false |
| 4. | Both (A) and (R) are false statements |
Subtopic: Sources of Variation |
67%
From NCERT
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Which of the following statement is true about genetic drift?
| 1. | If operates in large populations |
| 2. | If always eliminates favourable allele from a population. |
| 3. | If work in opposite to natural selection |
| 4. | If can not fix non-adaptive trait in a population |
Subtopic: Concept of Speciation |
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A: Pre-existing advantageous mutations when selected will result in observation of new phenotype.
R: In small populations natural selection has less role to play in fixing a mutated gene or a gene combination.
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
R: In small populations natural selection has less role to play in fixing a mutated gene or a gene combination.
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Hugo De Vries Theory of Evolution | Modern Theory of Evolution |
56%
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| Assertion(A): | Ginkgo biloba is living fossil. |
| Reason(R): | Organism which have persisted and remain unchanged for the past several million years while their relatives disappeared. |
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
| 1. | Both (A) & (R) are true and (R) is the correct explanation of (A) |
| 2. | Both (A) & (R) are true but (R) is not the correct explanation of (A) |
| 3. | (A) is true but (R) is false |
| 4. | Both (A) and (R) are false |
Subtopic: Palentological Evidences of Evolution |
69%
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Allopatric speciation
Choose the correct answer from the options given below:
1. A and E only
2. A, E, and C only
3. A, B, and D only
4. A , B, C and E
| A. | New species evolve when one (or) more population of a species becomes separated from the other population of the species due to geographical barrier |
| B. | Small groups of individuals break off from the larger group and form a new species |
| C. | Over the time, cessation of the gene flow between geographically isolated population leads to the reproductive isolation |
| D. | The initial stage of allopatric speciation is polymorphism that does not depend on space within a population |
| E. | As a result of natural selection, geographically separate population become adapted to local conditions and thus they are genetically differentiated |
Choose the correct answer from the options given below:
1. A and E only
2. A, E, and C only
3. A, B, and D only
4. A , B, C and E
Subtopic: Concept of Speciation |
53%
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Given below are two statements
In light of the above statements, choose the most appropriate answer from the options given below
| Statement I : | In sympatric speciation, gene flow is reduced by polyploidy, sexual selection and habitat differentiation |
| Statement II: | Hybrid zones, which produce offspring of mixed ancestry, are the predicted outcome when species with incomplete reproductive barrier come into contact with one another. |
In light of the above statements, choose the most appropriate answer from the options given below
| 1. | Both Statement I and Statement II are correct |
| 2. | Both Statement I and Statement II are incorrect |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
Subtopic: Concept of Speciation |
64%
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