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Q. No.Thallus level of organisation, rhizoids, dominant gametophyte and dependence on water to complete its life are the characteristics seen in:
1.
Pteridophytes
2.
Gymnosperms
3.
Angiosperms
4.
Bryophytes
Subtopic: Bryophytes |
89%
Level 1: 80%+
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What is the correct description of a prothallus?
| 1. | A structure in gymnosperms formed just after fertilisation |
| 2. | A sporophytic free living structure formed in pteridophytes |
| 3. | A gametophytic free living structure formed in pteridophytes |
| 4. | Sex organs bearing stage in Bryophytes |
Subtopic: Pteridophytes |
78%
Level 2: 60%+
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A ‘protonema’ stage in the life cycle of a moss is the:
| 1. | first stage in gametophyte generation |
| 2. | second stage in gametophyte generation |
| 3. | first stage in sporophyte generation |
| 4. | second stage in sporophyte generation |
Subtopic: Bryophytes |
69%
Level 2: 60%+
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Besides starch, pyrenoids in many members of Chlorophyceae, contain:
| 1. | Double-stranded DNA |
| 2. | A low molecular weight RNA |
| 3. | Protein |
| 4. | Lipids |
Subtopic: Chlorophyceae: Green Algae |
87%
Level 1: 80%+
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In Cycas:
| I: | coralloid roots are associated with N2-fixing cyanobacteria |
| II: | the stems are unbranched |
| III: | the pinnate leaves persist for a few years |
| 1. | Only I and II are correct |
| 2. | Only I and III are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: Gymnosperms |
80%
Level 1: 80%+
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| Column I [Algal class] |
Column II [Feature of flagella] |
||
| A | Chlorophyceae | P | 2, unequal, lateral |
| B | Phaeophyceae | Q | Absent |
| C | Rhodophyceae | R | 2-8, equal, apical |
| A | B | C | |
| 1. | R | P | Q |
| 2. | R | Q | P |
| 3. | P | R | Q |
| 4. | Q | R | P |
Subtopic: Pheophyceae: Brown Algae | Rhodophyceae: Red Algae and Importance of Algae | Chlorophyceae: Green Algae |
88%
Level 1: 80%+
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Match each item in Column I with one in Column II and select the correct match from the codes given:
| Column I [Pteridophyte class] |
Column II [Example] |
||
| A | Psilopsida | P | Psilotum |
| B | Lycopsida | Q | Adiantum |
| C | Sphenopsida | R | Selaginella |
| D | Pteropsida | S | Equisetum |
| A | B | C | D | |
| 1. | P | R | Q | S |
| 2. | P | R | S | Q |
| 3. | P | S | R | Q |
| 4. | Q | S | R | P |
Subtopic: Pteridophytes |
83%
Level 1: 80%+
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Evolutionarily, pteridophytes are the first:
| 1. | plants with haplontic life cycle |
| 2. | terrestrial plants with dominant gametophytic generation |
| 3. | plants to produce flowers pollinated by insects |
| 4. | terrestrial plants to possess vascular tissues |
Subtopic: Pteridophytes |
91%
Level 1: 80%+
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A | Ulothrix | P | Brown algae with diplontic life cycle |
| B | Ectocarpus | Q | Major pigments are chlorophyll a and b |
| C | Fucus | R | Brown algae with haplo-diplontic life cycle |
| D | Polysiphonia | S | Lack flagella |
| A | B | C | D | |
| 1. | P | S | Q | R |
| 2. | Q | P | R | S |
| 3. | Q | R | P | S |
| 4. | R | Q | S | P |
Subtopic: Pheophyceae: Brown Algae | Chlorophyceae: Green Algae |
76%
Level 2: 60%+
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Floridean starch is a form of:
| 1. | stored food in red algae that resembles the structure of amylopectin and glycogen |
| 2. | stored food in brown algae that resembles the structure of agarose and agaropectin |
| 3. | carbohydrate found in cell wall of brown algae that resembles the structure of amylopectin and glycogen |
| 4. | carbohydrate found in cell wall of red algae that resembles the structure of agarose and agaropectin |
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
90%
Level 1: 80%+
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