Q. No.I: It is the most acceptable system for classification of living organisms.
II: The vegetative characters are more easily affected by environment.
1. I is correct and II is incorrect
2. Both I and II are correct and II explains I
3. I is incorrect and II is correct
4. Both I and II are correct but II does not explain I
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1. an artificial system based mainly on the androecium structure.
2. a natural system based on large number of natural affinities between flowering plants.
3. was a phylogenetic system based on evolutionary relationships.
4. was a chemotaxonomic system based on structure of homologous proteins.
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In numerical taxonomy:
I. computers are used and all the observable characters are taken into consideration.
II. hundreds of characters can be considered together and each character is given equal importance.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. both I and II are incorrect
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1. It is a natural system of classification.
2. It totally disregarded the external characters and did not include them to classify plants.
3. It used internal features like structure, anatomy, embryology and phytochemistry.
4. It was based on natural affinities among the organisms.
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| A | B | C | D | |
| 1. | Vascular plants | Seed plants | Green plants | Land plants |
| 2. | Land plants | Green plants | Seed plants | Vascular plants |
| 3. | Green plants | Land plants | Vascular plants | Seed plants |
| 4. | Seed plants | Vascular plants | Land plants | Green plants |
| COLUMN I [Classification method] |
COLUMN II [Feature used] |
||
| A. | Artificial | P. | Evolutionary relationships |
| B. | Phylogenetic | Q. | Gross morphological characters |
| C. | Chemotaxonomy | R. | Chemical constituents of plants |
| D. | Cytotaxonomy | S. | Chromosome number, structure and behaviour |
Codes
| A | B | C | D | |
| 1. | P | Q | S | R |
| 2. | Q | P | R | S |
| 3. | R | S | P | Q |
| 4. | S | R | Q | P |
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Fusion of two gametes which are dissimilar in size is termed as
| 1. Oogamy | 2. Isogamy |
| 3. Anisogamy | 4. Zoogamy |
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The earliest land plants lacked true roots. What may have enabled them the most to colonize land?
1. Symbiotic associations with fungi
2. Prostrate thalloid body
3. Motile antherozoids capable of reaching the egg through water
4. Parasitic and saprophytic modes of nutrition
The form and size of algae is highly variable. Which of the following will not be true?
I. Volvox is a colonial alga.
II. Ulothrix and Spirogyra do not form filaments.
III. Kelps form massive plants bodies.
| 1. Only II | 2. Only III |
| 3. Both I and II | 4. Both II and III |
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Identify the incorrectly matched pair:
| Alga | Sexual reproduction | |
| I. | Ulothrix | Isogamous; non-flagellated gametes |
| II. | Spirogyra | Isogamous; flagellated gametes |
| III. | Udorina | Anisogamous |
| IV. | Fucus | Oogamous |
| 1. Only III | 2. I, II and III |
| 3. Only I and II | 4. Only III and IV |
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