In pteridophytes, Selaginella:
1.
has macrophylls
2.
stobili or cones are not seen
3.
is hetrosporous
4.
lacks vascular tissue
Subtopic: Â Pteridophytes |
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In algae with haplontic life cycle:
| I: | there are no free-living sporophytes |
| II: | mitosis in zygote results in diploid spores |
| III: | gametophyte is the dominant photosynthetic phase |
| 1. | Only I and II are correct |
| 2. | Only I and III are correct |
| 3. | Only II and III are correct |
| 4. | Only II and III are correct |
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Sphagnum is a bryophyte, commonly called as bog moss or peat moss, that is used as packing material for trans-shipment of living materials because:
1. It is easily available
2. It is hygroscopic
3. It is hydrophobic
4. It prevents soil erosion
1. It is easily available
2. It is hygroscopic
3. It is hydrophobic
4. It prevents soil erosion
Subtopic: Â Bryophytes |
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Which of the following is true regarding the classes of Bryophytes?
| 1. | The thallus of mosses is dorsiventral and closely appressed to the surface |
| 2. | In the life cycle of liverworts, the predominant gametophytic stage is divided into two stages - the protonema and the leafy stage |
| 3. | The sporophyte in liverworts is more elaborate than in mosses |
| 4. | Asexual reproduction in liverworts takes place by fragmentation of thalli, or by the formation of specialised structures called gemmae |
Subtopic: Â Bryophytes (Liverworts) |
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The algae shown in the diagram below belongs to the class which has:
1. 2-8 equal and apical flagella
2. 2 unequal and lateral flagella
3. 2 unequal and apical flagella
4. 2-8 equal and lateral flagella
1. 2-8 equal and apical flagella
2. 2 unequal and lateral flagella
3. 2 unequal and apical flagella
4. 2-8 equal and lateral flagella
Subtopic: Â Algae |
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Level 1: 80%+
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Given below are two statements:
| Statement I: | Chlorella is used as food supplement by space travellers |
| Statement II: | Chlorella is a unicellular algae |
| 1. | Both I and II are true and II correctly explains I |
| 2. | I is true and II is false |
| 3. | Both I and II are true but II does not explain I |
| 4. | Both I and II are false |
Subtopic: Â Algae |
 78%
Level 2: 60%+
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Selaginella, a pteridophyte which belongs to the class Lycopsida, is:
| 1. | heterosporous and has microphylls |
| 2. | homosporous and has macrophylls |
| 3. | homosporous and has microphylls |
| 4. | heterosporous and has macrophylls |
Subtopic: Â Pteridophytes |
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Which of the following statement is true about the difference between Cycas and Pinus?
| 1. | Pinus has coralloid roots associated with N2-fixing cyanobacteria, whereas Cycas has roots with fungal association in the form of mycorrhiza |
| 2. | Cycas is heterosporous, whereas Pinus is homosporous |
| 3. | Male cones and female megasporophylls are borne on different trees in Cycas, whereas they are borne on the same tree in Pinus |
| 4. | Stems of Cycas are branched, whereas Pinus has unbranched stems |
Subtopic: Â Gymnosperms |
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Which of the following algae exhibits the life cycle as shown in the diagram below?
1. Fucus
2. Spirogyra
3. Ectocarpus
4. Polysiphonia
1. Fucus
2. Spirogyra
3. Ectocarpus
4. Polysiphonia
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Consider the following statements about the different classes of algae:
| I: | The members of Chlorophyceae have a rigid cell wall made of an inner layer of cellulose and an outer layer of pectose |
| II: | The members of Rhodophyceae do not have a flagellum |
| III: | Members of Phaeophyceae store food as floridean starch which is very similar to amylopectin and glycogen in structure |
| 1. | Only I and III are correct |
| 2. | Only I and II are correct |
| 3. | Only II and III are correct |
| 4. | All I, II and III are correct |
Subtopic: Â Chlorophyceae: Green Algae |
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