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Q. No.Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A):
The spread of living pteridophytes is limited and restricted to narrow geographical regions.
Reason (R):
Evolutionarily, pteridophytes are the first terrestrial plants to possess vascular tissues – xylem and phloem.
In the light of the above statements choose the correct answer from the options given below:
1.
Both (A) and (R) are True and (R) is the correct explanation of (A).
2.
Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.
(A) is True but (R) is False.
4.
Both (A) and (R) are False.
Subtopic: Pteridophytes |
80%
From NCERT
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What would be true for both Cycas and Pinus?
| 1. | Cycas is a gymnosperm and Pinus is a pteridophyte |
| 2. | The gametophyte is dominant in the life cycle of Cycas and the sporophytes is dominant in the life cycle of Pinus |
| 3. | Roots of Pinus have mycorrhiza association and coralloid roots of Cycas are associated with nitrogen-fixing cyanobacteria |
| 4. | In Pinus, the male and female cones are borne on different trees and in Cycas on the same tree |
Subtopic: Gymnosperms |
89%
From NCERT
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Genera like Selaginella and Salvinia:
1. do not possess vascular tissues
2. have a dominant gametophyte in their life cycle
3. produce two kinds of spores
4. have macrophylls
1. do not possess vascular tissues
2. have a dominant gametophyte in their life cycle
3. produce two kinds of spores
4. have macrophylls
Subtopic: Pteridophytes |
88%
From NCERT
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The cell wall of the cells of an alga has cellulose and algin. Another feature expected in this alga would be:
| 1. | Floridean starch as stored food |
| 2. | Phycoerythrin in addition to chlorophyll a, c |
| 3. | 2, unequal, lateral flagellar insertions |
| 4. | Polysulphate esters in cell wall |
Subtopic: Pheophyceae: Brown Algae |
73%
From NCERT
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Regarding artificial system of classification of living organisms:
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
| 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
Subtopic: Classification System: II |
77%
From NCERT
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The system of classification of plants given by Carolus Linnaeus was:
| 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. |
Subtopic: Classification System: II |
84%
From NCERT
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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
Subtopic: Classification System: I |
84%
From NCERT
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Match each item in Column I with one in Column II and select the correct match as your answer from the coders given:
Codes
| 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 |
Subtopic: Classification System: II |
95%
From NCERT
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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 |
Subtopic: Algae |
82%
From NCERT
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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 |
Subtopic: Algae |
77%
From NCERT
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