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Q. No.The vegetative propagule in the angiosperm Agave is known as:
1. Bulbil
2. Runner
3. Rhizome
4. Bulb
Subtopic: Asexual Reproduction |
92%
From NCERT
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Strobilanthes kunthiana [neelakurinji] flowers once in every:
1. 2 years
2. 12 years
3. 20 to 25 years
4. 50 to 100 years
Subtopic: Sexual Reproduction |
94%
From NCERT
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Identify the correct statements amongst the following:
| A: | All sexually reproducing organisms are diploid. |
| B: | The major difference between different cells in the same organism is that they have different DNA. |
1. Only A
2. Only B
3. Both A and B
4. Neither A nor B
Subtopic: Events during Sexual reproduction |
From NCERT
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Clear cut vegetative, reproductive and senescent phases are seen in:
I: Annual plants
II: Biennial plants
III: Perennial plants
1. Only I
2. Only III
3. Only I and II
4. I, II and III
I: Annual plants
II: Biennial plants
III: Perennial plants
1. Only I
2. Only III
3. Only I and II
4. I, II and III
Subtopic: Sexual Reproduction |
74%
From NCERT
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Subtopic: Asexual Reproduction |
93%
From NCERT
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Given below are two statements:
| Assertion (A): | In protists and monerans, the organism or the parent cell divides into two to give rise to new individuals. |
| Reason (R): | In single celled organisms, cell division is itself a mode of reproduction. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (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: Asexual Reproduction |
74%
From NCERT
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Given below are two statements:
| Assertion (A): | The gametes produced in some algae are called as isogametes. |
| Reason (R): | Isogametes of algae are so similar in appearance that it is not possible to categorise them into male and female gametes. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (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: Events during Sexual reproduction |
79%
From NCERT
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Given below are two statements:
| Assertion (A): | In a majority of plants, syngamy occurs inside the body of an organism. |
| Reason (R): | Higher animals such as reptiles, birds and mammals generally exhibit internal fertilization. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (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: Events during Sexual reproduction |
61%
From NCERT
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Given below are two statements:
| Assertion (A): | Meiocyte is a cell which undergoes reductional division and contains two sets of chromosomes in diploid organism. |
| Reason (R): | In meiocyte of onion, there are 16 chromosomes. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (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: Sexual Reproduction | Events during Sexual reproduction |
71%
From NCERT
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Given below are two statements:
| Assertion (A): | Term 'clone' can be used to describe morphologically and genetically similar individuals. |
| Reason (R): | In protists and monerans, cell division is itself a mode of reproduction. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (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: Asexual Reproduction |
80%
From NCERT
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