Q. No.Which one of the following statements is wrong?
1.
Laminaria and Sargassum are used as food.
2.
Algae increase the level of dissolved oxygen in the immediate environment.
3.
Algin is obtained from red algae, and carrageenan from brown algae.
4.
Agar-agar is obtained from Gelidium and Gracilaria.
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Select the mismatch:
| 1. | Pinus - Dioecious | 2. | Cycas - Dioecuous |
| 3. | Salvinia - Heterosporous | 4. | Equisetum - Homosporous |
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Functional megaspore in an angiosperm develops into:
| 1. | Ovule | 2. | Endosperm |
| 3. | Embryo sac | 4. | Embryo |
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Life cycle of Ectocarpus and Fucus respectively are:
| 1. Haplontic, Diplontic | 2. Diplontic, Haplodiplontic |
| 3. Haplodiplontic, Diplontic | 4. Haplodiplontic, Haplontic |
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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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Holdfast, stipe and frond constitutes the plant body in case of
1. Rhodophyceae
2. Chlorophyceae
3. Phaeophyceae
4. All of the above
A plant shows thallus level of organization. It shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile. Identify the group to which it belongs to.
| 1. | Pteridophytes | 2. | Gymnosperms |
| 3. | Monocots | 4. | Bryophytes |
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A prothallus is
| 1. | A structure in pteridophytes formed before the thallus develops |
| 2. | A sporophytic free living structure formed in pteridophytes |
| 3. | A gametophyte free living structure formed in pteridophytes |
| 4. | A primitive structure formed after fertilization in pteriodophytes |
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