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Q. No.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.
an axis to form lax or compact strobili or cones.
Subtopic: Gymnosperms |
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The leafy stage in the life cycle of a moss:
| 1. | develops from the primary protonema. |
| 2. | consists of upright, slender axes bearing spirally arranged leaves. |
| 3. | is attached to the soil through unicellular and unbranched rhizoids. |
| 4. | lacks the sex organs. |
Subtopic: Bryophytes | Bryophytes (Anthoceropsida) |
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The given diagram shows:
1. Female gametophyte of Marchantia
2. Male gametophyte of Marchantia
3. Female gametophyte of Funaria
4. Male gametophyte of Funaria
1. Female gametophyte of Marchantia
2. Male gametophyte of Marchantia
3. Female gametophyte of Funaria
4. Male gametophyte of Funaria
Subtopic: Bryophytes |
93%
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Consider the two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | Classification for flowering plants given by George Bentham and Joseph Dalton Hooker is a natural system of classification. |
| Statement II: | Classification for flowering plants given by Linnaeus is an artificial system of classification. |
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Classification System |
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Identify the incorrectly matched pair:
| 1. | Phylogenetic classification systems | Based on evolutionary relationships |
| 2. | Numerical Taxonomy | Based on all observable characteristics |
| 3. | Cytotaxonomy | Based on a few vegetative characters only. |
| 4. | Chemotaxonomy | Uses the chemical constituents of the plant |
Subtopic: Classification System |
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In bryophytes:
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: | Zygotes undergo reduction division immediately. |
| II: | The sporophyte is not free-living but attached to the photosynthetic gametophyte and derives nourishment from it. |
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: Bryophytes |
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Fragmentation and budding in the secondary protonema are means
of vegetative reproduction in:
1. Mosses
2. Liverworts
3. Vascular cryptogams
4. Thalloid green algae
of vegetative reproduction in:
1. Mosses
2. Liverworts
3. Vascular cryptogams
4. Thalloid green algae
Subtopic: Bryophytes |
87%
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In Selaginella and Equisetum:
| 1. | spores produced are of one kind. |
| 2. | heterospory is seen. |
| 3. | gametophyte is the dominant generation in the life cycle. |
| 4. | sporophylls form distinct compact structures called strobili or cones. |
Subtopic: Pteridophytes: Heterospory |
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In gymnosperms, pollen grains:
| 1. | develop outside microsporangia |
| 2. | are a result of mitosis in certain pollen mother cells |
| 3. | are carried in air currents |
| 4. | do not form pollen tubes and the male gamete is released into water |
Subtopic: Gymnosperms: I |
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Algae are useful to man in a variety of ways. Identify the correct statements:
1. Only I, II, III and IV
2. Only I, II, IV and V
2. Only I, II and III
4. Only II, III and IV
| I: | At least a half of the total carbon dioxide fixation on earth is carried out by algae through photosynthesis. |
| II: | They are of paramount importance as primary producers of energy-rich compounds which form the basis of the food cycles of all aquatic animals. |
| III: | Many species of Porphyra, Laminaria and Sargassum are among the 70 species of marine algae used as food. |
| IV: | Agar, one of the commercial products obtained from Gelidium and Gracilaria, are used to grow microbes and in preparations of ice-creams and jellies. |
| V: | Chlorella, a multicellular alga rich in proteins, is used as food supplement even by space travellers. |
1. Only I, II, III and IV
2. Only I, II, IV and V
2. Only I, II and III
4. Only II, III and IV
Subtopic: Algae |
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