Q. No.Red algae photosynthesize at ocean depths greater than any other group of algae and hence can be found in deepest waters because they
1.
contain a higher concentration of chlorophyll
2.
have an extremely large surface area to capture the little amount of light that reaches them
3.
contain the pigment phycoerythrin
4.
periodically float to the surface and intercept light, then move back to the ocean floor
The given diagram shows:
1. Female thallus of Marchantia
2. Male thallus of Marchantia
3. Female thallus of Funaria
4. Male thallus of Funaria
Vegetative reproduction in mosses is by:
1. Fragmentation and budding in secondary protonema
2. Only budding in secondary protonema
3. Adventitious roots and budding in secondary protonema
4. Fragmentation and budding in sporophyte
The structure marked as “b” can be used for:
1. Photosynthesis
2. Attachment
3. Buoyancy
4. Reproduction
The economic importance of bryophytes include:
| I: | A moss provides peat used as a packing material |
| II: | They are early colonizers of land in ecological succession |
| III: | They can decompose rocks |
| IV: | They can prevent soil erosion |
| 1. | Only I, II and III | 2. | Only I, III and IV |
| 3. | Only II, III and IV | 4. | I, II, III and IV |
Identify the incorrect statement regarding red algae:
1. Major pigments are chlorophyll a, c and phycocyanin
2. Stored food is floridean starch
3. Cellulosic cell wall with pectin and polysulfate esters
4. Absent flagellar insertions
Unlike bryophytes and pteridophytes, in gymnosperms:
| 1. | the male and female gametophytes do not have an independent existence |
| 2. | the vascular tissue is poorly developed |
| 3. | the reproduction is dependent on water in most cases |
| 4. | the plants bodies are clearly differentiated into root, stem and leaves |
Prothallus is a:
| 1. | Multicellular, free-living, mostly photosynthetic thalloid gametophyte in pteridophytes |
| 2. | Multicellular, free-living, mostly photosynthetic thalloid sporophyte in pteridophytes |
| 3. | Multicellular, free-living, non photosynthetic thalloid gametophyte in pteridophytes |
| 4. | Multicellular, free-living, mostly photosynthetic well differentiated sporophyte in pteridophytes |
Consider the following statements regarding green algae:
| I: | Pigments are located in definite plastids |
| II: | Most have pyrenoids in chloroplasts |
| III: | Cell wall has an inner layer of pectose and outer layer of cellulose |
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
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