- 1(current)
Q. No.| Assertion (A): | The megaspore mother cell divide mitotically to produce four spores. |
| Reason (R): | Megaspore mother cells are diploid and megaspore is haploid. |
| 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. | (A) is False but (R) is True. |
Choose the correct match with respect to ploidy level in angiosperms :
1. Synergids - Triploid (3n)
2. Antipodal cells - Triploid (3n
3. Secondary nucleus- Diploid (2n)
4. Egg cell - Diploid (2n)
Match the two columns that represent plant organs (I) and parts within these organs (II).
| Column I | Column II |
| A. Carpel | (i) calyx, corolla |
| B. Perianth | (ii) Vegetative cell, generative cell |
| C. Microsporocyte | (iii) Stigma, style, ovary |
| D. Megasporocyte | (iv) Antipodal cells, polar nuclei, synergid cell |
1. A-(i); B-(iii); C-(ii); D-(iv)
2. A-(iii); B-(iv); C-(i); D-(ii)
3. A-(i); B-(iii); C-(iv); D-(ii)
4. A-(iii); B-(i); C-(ii); D-(iv)
Read the two statements A & B given below and select the correct option :
A- Embryo sac of angiosperms is a 7 celled structure.
B – Embryo sac has three synergid cells.
1. Both A and B are correct
2. Both A and B are incorrect
3. Only A is correct
4. Only B is correct
From the statements given below choose the option that is true for a typical female gametophyte.
| i. | It is eight-nucleate and seven-celled at maturity. |
| ii. | It is free-nuclear during the development. |
| iii. | It is situated inside the integument, but outside the nucellus. |
| iv. | It has an egg apparatus situated at the chalazal end. |
1. (i) and (iv)
2. (ii) and (iii)
3. (i) and (ii)
4. (ii) and (iv)
From the statements given below choose the option that are not true for a typical female gametophyte of a flowering plant:
| (i) | It is 8-nucleate and 7-celled at maturity. |
| (ii) | It is cellular during the development. |
| (iii) | It is situated inside the nucellus |
| (iv) | It has an egg apparatus situated at the chalazal end |
| 1. | i and iv | 2. | ii and iii |
| 3. | i and ii | 4. | ii and iv |
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