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Q. No.What algae has been depicted in the given figure?
1.
Laminaria
2.
Fucus
3.
Polysiphonia
4.
Volvox
Subtopic: Chlorophyceae: Green Algae |
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Which of the following will not be true regarding Pteridophytes?
1. A dominant sporophyte.
2. Possess vascular tissues.
3. All are heterosporous.
4. Include horsetails.
1. A dominant sporophyte.
2. Possess vascular tissues.
3. All are heterosporous.
4. Include horsetails.
Subtopic: Pteridophytes |
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Which of the following is a heterosporous pteridophyte?
| 1. | Equisetum | 2. | Selaginella |
| 3. | Pteris | 4. | Lycopodium |
Subtopic: Pteridophytes |
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Match List-I with List-II
Choose the correct answer from the options given below:
1. A-IV, B-II, C-III, D-I
2. A-III, B-IV, C-I, D-II
3. A-III, B-II, C-I, D-IV
4. A-IV, B-I, C-II, D-III
| List-I | List-II | ||
| A. | Ulothrix | I. | Anisogamy |
| B. | Spirogyra | II. | Oogamy |
| C. | Eudorina | III. | Isogamy, flagellated similar in size gametes |
| D. | Fucus | IV. | Isogamy, non-flagellated similar in size gametes |
1. A-IV, B-II, C-III, D-I
2. A-III, B-IV, C-I, D-II
3. A-III, B-II, C-I, D-IV
4. A-IV, B-I, C-II, D-III
Subtopic: Algae |
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Which of the following is not applicable for members of Rhodophycae?
| 1. | Presence of r-phycoerythrin |
| 2. | Found only near the surface of water bodies, never deep. |
| 3. | Absence of flagella |
| 4. | Floridean starch is the stored food. |
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
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Species of Sphagnum, a moss, provide peat that has long been used as fuel and as packing material for transhipment of living material. Which of the following statements best explains why Sphagnum is suitable for these applications?
| 1. | Sphagnum has a high lignin content, making it resistant to decay and suitable for fuel. |
| 2. | Sphagnum can absorb and retain large amounts of water due to its unique cellular structure, making it ideal for packing living material. |
| 3. | Sphagnum contains silica deposits in its cell walls, which provide rigidity and durability. |
| 4. | Sphagnum releases antimicrobial compounds that prevent the growth of pathogens in packed materials. |
Subtopic: Bryophytes |
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Pteridophytes differ from bryophytes on one hand and gymnosperms on the other because:
| 1. | Unlike bryophytes, pteridophytes have a dominant gametophyte phase, and unlike gymnosperms, they reproduce only through spores. |
| 2. | Unlike bryophytes, pteridophytes lack alternation of generations, and unlike gymnosperms, they possess multicellular sex organs. |
| 3. | Unlike bryophytes, pteridophytes lack roots, stems, and leaves, but unlike gymnosperms, they have chlorophyll a and b. |
| 4. | Unlike bryophytes, pteridophytes have vascular tissue, but unlike gymnosperms, they do not produce seeds. |
Subtopic: Pteridophytes |
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Consider the given statements:
| Statement I: | Needle-like leaves in conifers help reduce water loss by minimizing surface area. |
| Statement II: | The thick cuticle and sunken stomata in gymnosperm leaves are adaptations to withstand extreme temperatures and water scarcity. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Gymnosperms |
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What evolutionary advancement do pteridophytes exhibit compared to bryophytes?
| 1. | Development of vascular tissues (xylem and phloem) |
| 2. | Presence of motile sperm for fertilization |
| 3. | Dominant gametophytic generation |
| 4. | Reproduction by vegetative propagation only |
Subtopic: Bryophytes | Pteridophytes |
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Which feature of the bryophyte gametophyte makes it distinct from the sporophyte?
| 1. | It is diploid and dependent on the sporophyte. |
| 2. | It produces spores for asexual reproduction. |
| 3. | It is haploid and independent, serving as the dominant phase of the life cycle. |
| 4. | It has vascular tissues for water and nutrient transport. |
Subtopic: Bryophytes |
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