1 | A – Interphase | B – Prophase |
2 | A – S – phase | B – Telophase |
3 | A – Synthetic phase | B – Gap 2 phase |
4 | A – Interphase | B – Anaphase |
Statement I: | In male honeybees, haploid cells divide by mitosis. |
Statement II: | Higher plants show mitotic divisions only in diploid cells. |
1. | Statement I is correct and Statement II is incorrect. |
2. | Statement I is incorrect and Statement II is incorrect. |
3. | Statement I is correct and Statement II is correct. |
4. | Statement I is incorrect and Statement II is correct. |
Metaphase I is different from mitotic metaphase as in the later case
1. | Two metaphasic plates are formed |
2. | Tetrads are arranged at the equator |
3. | Single metaphasic plate is formed |
4. | Homologous chromosomes get separated from each other |
Which of the following does not take place during telophase of mitosis?
1. | Chromosomes become discrete. |
2. | Nuclear envelope reforms. |
3. | Chromosomes cluster at opposite spindle poles. |
4. | Nucleolus, endoplasmic reticulum, and Golgi complex reform. |
Given below are two statements : One is labeled as Assertion (A) and the other is labeled as Reason (R)
Assertion (A): | The growth of the multicellular organism is due to mitosis |
Reason (R): | Mitosis is also called as equational division and it offers genetic stability |
In light of the above statements choose the correct answer from the options given below:
1. | (A) is True but (R) is False. |
2. | (A) is False but (R) is True. |
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). |
Assertion (A): | Metaphase is the stage at which morphology of chromosomes is most easily studied. |
Reason (R): | At this stage, metaphase chromosome is made up of two sister chromatids, which are held together by the centromere. |
1. | (A) is True; (R) is False |
2. | Both (A) and (R) are True and (R) correctly explains (A) |
3. | Both (A) and (R) are True but (R) does not correctly explain (A) |
4. | (A) is False; (R) is True |
I: | In some lower plants and in some social insects, haploid cells also divide by mitosis. |
II: | Mitotic divisions in the meristematic tissues – the apical and the lateral cambium, result in a continuous growth of plants throughout their life. |