Q. No.A typical anther shows
a. Two lobes with two theca each
b. Each lode as dithecous
c. All cells in a given microsporangium as potential PMC
d. Thousands of micropores per microsporangium
Out of these statements
1. b is incorrect
2. a and b are correct
3. c and d are incorrect
4. a, b, c and d are correct
Assertion : Cleistogamy is advantageous to the plants.
Reason : It results in the assured seed formation even in the absence of pollinators.
1. If both Assertion & Reason are true and the Reason is the correct explanation of the Assertion.
2. If both Assertion & Reason are true but the Reason is not the correct explanation of the Assertion
3. If Assertion is a true statement but Reason is false.
4. If both Assertion and Reason are false.
Match the following :
| Column I | Column I | ||
| (I) | External fertilization | (i) | pollen grain |
| (II) | Androecium | (ii) | anther wall |
| (III) | Male gametophyte | (iii) | algae |
| (IV) | Primary parietal layer | (iv) | stamens |
1. I-iv; II-i; III-ii; IV-iii
2. I-iii; II-iv; III-i; IV-ii
3. I-iii; II-iv; III-ii; IV-i
4. I-iii; II-i; III-iv; IV-ii
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)
Identify two correct characteristic features of (P) Autogamy and (Q) Allogamy from the following statements
| 1. | Plant species usually does not depend on external agents |
| 2. | Plant species usually depends on external agents |
| 3. | Plant species normally produces progeny that are healthier and better adapted in nature |
| 4. | Plant species normally produces weaker progeny in several generations |
| 1. | P-1,3; Q-2,4 | 2. | P-2,4; Q-1,3 |
| 3. | P-1,4; Q-2,3 | 4. | P-2,3; Q-1,4 |
Which process is matched with a valid example?
| Process | Example |
| 1. seed dispersal | a stamen explodes in the wind |
| 2. fertilization | a nucleus from the pollen grain fuses with a nucleus in the ovule |
| 3. fertilization | a bee carries pollen from flower to flower |
| 4. pollination | seeds are blown from a flower onto another one by the wind |
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)
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
| I: | In castor and maize, autogamy is prevented but not geitonogamy |
| II. | In papaya, both autogamy and geitonogamy are prevented |
| 1. | Both I and II | 2. | Only I |
| 3. | Only II | 4. | Neither I nor II |
| Column-I | Column-II | ||
| A. | Groundnut | P. | Lack endosperm |
| B. | Coconut | Q. | Endosperm persists in mature seeds |
| C. | Orchids | R. | Endosperm is completely consumed by developing embryo |
| A | B | C | |
| 1. | P | Q | R |
| 2. | R | Q | P |
| 3. | R | P | Q |
| 4. | P | R | Q |
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