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Q. No.Sexual reproduction is oogamous and accompanied by complete post-fertilization developments in the members of:
1.
Chlorophyceae
2.
Phaeophyceae
3.
Rhodophyceae
4.
Both Chlorophyceae and Phaeophyceae
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
72%
Level 2: 60%+
Hints
Which of the following is expected to be found in deepest waters?
| 1. | Red algae | 2. | Green algae |
| 3. | Brown algae | 4. | Blue green algae |
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
84%
Level 1: 80%+
Hints
Which of the following statement will not be true regarding bryophytes?
| 1. | They are dependent on water for sexual reproduction. |
| 2. | Archegonium is flask shaped and produces multiple eggs. |
| 3. | Sporophyte is attached to the photosynthetic gametophytes and derives nourishment from it. |
| 4. | The antherozoids are released into water. |
Subtopic: Bryophytes |
84%
Level 1: 80%+
Hints
Regarding Marchantia:
| I: | The thallus is dorsi-ventral and closely appressed to the substrate. |
| II: | The plant is monoecious. |
| 1. | Both I and II are incorrect |
| 2. | Only I is incorrect |
| 3. | Only I is correct |
| 4. | Both I and II are correct |
Subtopic: Bryophytes (Liverworts) |
61%
Level 2: 60%+
Hints
Sporophyte is differentiated into a foot, a seta and a capsule in:
I. Liverworts
II. Mosses
I. Liverworts
II. Mosses
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
Subtopic: Bryophytes (Liverworts) |
60%
Level 2: 60%+
Hints
Consider the given statements regarding Mosses:
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
| I: | Protonema is a gametophyte stage that is creeping, green, branched and frequently filamentous. |
| II: | Leafy stage bears sex organs and is attached to the soil through multicellular and branched rhizoids. |
| III: | Sex organs are produced at the apex of the leafy shoot. |
| IV: | They have an elaborate mechanism of spore dispersal. |
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic: Bryophytes (Anthoceropsida) |
76%
Level 2: 60%+
Hints
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Heterospory in some pteridophytes paved the way for the evolution of seeds in higher plants. |
| Reason (R): | The megaspores and microspores in heterosporous ferns give rise to female and male gametophytes respectively. |
In the light of the above statements choose the correct answer from the options given below:
| 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. | (A) is False but (R) is True. |
Subtopic: Pteridophytes: Heterospory |
Level 3: 35%-60%
Hints
In angiosperms:
I. The dicots are characterized by seeds having two cotyledons, reticulate venation and trimerous flowers.
II. The monocots are characterized by single cotyledonous seed, parallel venation and tetramerous or pentamerous flowers.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I. The dicots are characterized by seeds having two cotyledons, reticulate venation and trimerous flowers.
II. The monocots are characterized by single cotyledonous seed, parallel venation and tetramerous or pentamerous flowers.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
52%
Level 3: 35%-60%
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In Haplontic life cycle:
| I. | Sporophytic generation is represented only by the one-celled zygote. |
| II. | Meiosis in zygote results in the formation of haploid gametes. |
| III. | The dominant photosynthetic stage is the free living gametophyte |
| 1. | Only I is correct |
| 2. | Only I and III are correct |
| 3. | Only II is correct |
| 4. | I, II and III are correct |
Level 3: 35%-60%
Hints
Regarding plants exhibiting diplontic life cycle:
1. Gametophyte is the dominant photosynthetically independent phase.
2. The sporophytic stage is represented by the single to few-celled diploid sporophyte.
3. All seed bearing plants follow this pattern with some variations.
4. Most algae follow this type of life cycle.
1. Gametophyte is the dominant photosynthetically independent phase.
2. The sporophytic stage is represented by the single to few-celled diploid sporophyte.
3. All seed bearing plants follow this pattern with some variations.
4. Most algae follow this type of life cycle.
61%
Level 2: 60%+
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