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Q. No.Which of the following options most accurately describes algae in general?
1.
Algae are chlorophyll-bearing, thalloid, autotrophic and largely aquatic
(both fresh water and marine) organisms.
2.
Algae are chlorophyll-bearing, having highly differentiated body, autotrophic and
exclusively found in fresh water organisms.
3.
Algae are chlorophyll-bearing or parasitic heterotrophic organisms,
thalloid and largely marine organisms.
4.
Algae are chlorophyll-lacking, thalloid, autotrophic and largely saprophytic
organisms found in both fresh and marine waters.
(both fresh water and marine) organisms.
exclusively found in fresh water organisms.
thalloid and largely marine organisms.
organisms found in both fresh and marine waters.
Subtopic: Algae |
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Pyrenoids:
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: | are found in chloroplasts of many algae. |
| II: | contain protein besides starch. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae: II | Chlorophyceae: Green Algae: III |
73%
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All the following belong to phaeophyceae except:
1. Ectocarpus
2. Polysiphonia
3. Dictyota
4. Laminaria
1. Ectocarpus
2. Polysiphonia
3. Dictyota
4. Laminaria
Subtopic: Pheophyceae: Brown Algae |
91%
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One of the commercial products obtained from Gelidium and Gracilaria and which is used to grow microbes and in preparations of ice-creams and jellies is:
1. Agar
2. Algin
3. Carrageen
4. Inulin
1. Agar
2. Algin
3. Carrageen
4. Inulin
Subtopic: Algae |
91%
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The leaves in pteridophyta are:
1. microphylls in Selaginella or macrophylls in ferns.
2. macrophylls in Selaginella or microphylls in ferns.
3. microphylls in Selaginella and ferns.
4. macrophylls in Selaginella and ferns.
1. microphylls in Selaginella or macrophylls in ferns.
2. macrophylls in Selaginella or microphylls in ferns.
3. microphylls in Selaginella and ferns.
4. macrophylls in Selaginella and ferns.
Subtopic: Pteridophytes |
88%
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In majority of the pteridophytes:
1. Both I and II are correct
2. Both I and II are incorrect
3. Only I is correct
4. Only II is correct
| I: | transfer of male gamete to the female gamete does not require water |
| II: | all the spores are of similar kinds |
1. Both I and II are correct
2. Both I and II are incorrect
3. Only I is correct
4. Only II is correct
Subtopic: Pteridophytes |
From NCERT
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The reduced male gametophyte in a gymnosperm is called a:
1. pollen grain
2. microsporangium
3. microsporophyll
4. antheridium
1. pollen grain
2. microsporangium
3. microsporophyll
4. antheridium
Subtopic: Gymnosperms |
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The classification based on the premise that organisms belonging to the same taxa have a common ancestor is called as:
1. Cytotaxonomy
2. Phylogenetic system
3. Chemotaxonomy
4. Numerical taxonomy
1. Cytotaxonomy
2. Phylogenetic system
3. Chemotaxonomy
4. Numerical taxonomy
Subtopic: Classification System: I | Classification System: II | Classification System |
95%
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Green algae usually have a rigid cell wall made of:
| 1. | an inner layer of cellulose and an outer layer of pectose |
| 2. | an inner layer of pectose and an outer layer of cellulose |
| 3. | an inner layer of cellulose and an outer layer of lignin |
| 4. | an inner layer of cellulose and an outer layer of chitin |
Subtopic: Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae: II | Chlorophyceae: Green Algae: III |
90%
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Identify the incorrect statement:
| 1. | The gymnosperms are heterosporous. |
| 2. | Spores in gymnosperms are produced within sporangia. |
| 3. | Sporangia in gymnosperms are borne on sporophylls which are arranged spirally along an axis to form lax or compact strobili or cones. |
| 4. | Male strobili in gymnosperms are called macrosporangiate. |
Subtopic: Gymnosperms |
88%
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