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Q. No.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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Identify the correctly matched pair:
| 1. | Isogamy with flagellated gametes | Volvox |
| 2. | Isogamy with non-flagellated gametes | Ulothrix |
| 3. | Anisogamy | Udorina |
| 4. | Oogamy | Spirogyra |
Subtopic: Algae |
73%
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Select the option where the given characters are correct match for members of Rhodophyceae:
| Major pigments | Stored food | Cell wall | Flagella | |
| 1. | Chlorophyll a, d; phycoerythrin | Mannitol. Laminarin | Cellulose, pectin, polysulphate esters | 2-8, equal, apical |
| 2. | Chlorophyll a, d; phycoerythrin | Floridean starch | Cellulose, pectin, polysulphate esters | Absent |
| 3. | Chlorophyll a, c; Fucoxanthin | Mannitol. Laminarin | Cellulose and algin | 2, unequal, lateral |
| 4. | Chlorophyll a, b; | Starch | Cellulose | 2-8, equal, apical |
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
86%
From NCERT
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Regarding pteridophytes:
1. Only II is incorrect
2. Only I is correct
3. I and II are incorrect
4. I, II and III are correct
| I: | They are the first terrestrial plants to possess true vascular tissue |
| II: | Main plant is sporophyte |
| III: | Water is required for transfer of antherozoids |
2. Only I is correct
3. I and II are incorrect
4. I, II and III are correct
Subtopic: Pteridophytes |
89%
From NCERT
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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: Bryophytes (Liverworts) |
62%
From NCERT
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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: Algae |
80%
From NCERT
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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: Algae |
74%
From NCERT
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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: Gymnosperms |
61%
From NCERT
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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: Chlorophyceae: Green Algae |
61%
From NCERT
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Match each item in Column I with one in Column II and choose the correct option from the codes given below:
| Column I | Column II | ||
| A. | Psilopsida | P | Selanginella |
| B. | Lycopsida | Q | Adiantum |
| C. | Sphenopsida | R | Equisetum |
| D. | Pteropsida | S | Psilotum |
| A | B | C | D | |
| 1. | R | Q | S | P |
| 2. | S | P | R | Q |
| 3. | P | S | Q | R |
| 4. | Q | R | P | S |
Subtopic: Pteridophytes |
92%
From NCERT
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