Q. No.Conifers are adapted to tolerate extreme environmental conditions because of
1.
presence of vessels
2.
broad hardy leaves
3.
superficial stomata
4.
thick cuticle
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. |
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 |
Protonema is
1. Haploid and is found in mosses
2. Diploid and is found is liverworts
3. Diploid and is found in pteridophytes
4. Haploid and is found in pteridophytes
What is the function of the gemmae produced by some liverworts?
1. a water gathering structure
2. a light gathering structure
3. a sexual structure
4. an asexual structure
1. Unicellular
2. Multicellular
3. Acellular
4. Unicellular or multicellular
Ecologically important first colonizers of rocks are:
| 1. | Lichens | 2. | Algae |
| 3. | Gymnosperms | 4. | Angiosperms |
What is not true regarding bryophytes?
1. Zygote undergoes reduction division immediately
2. Sporophyte is not free living
3. Haploid spores are produced by meiosis
4. The sex organs are multi-cellular
1. Chlorophyceae
2. Phaeophyceae
3. Rhodophyceae
4. All algae
The term ‘strobilus’ in a gymnosperm defines a:
| 1. | collection of megasporophylls |
| 2. | collection of microsporophylls |
| 3. | site of sporangial development |
| 4. | collection of megasporophylls, microsporophylls and/or a site of sporangial development |
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