Q. No.A difference between a gymnosperm and an angiosperm would be:
1. Lack of a flower
2. Undeveloped vascular tissue
3. Xylem is mainly composed of vessels and phloem contains companion cell in angiosperms
4. Microspore grows into a pollen tube
1. Lack of a flower
2. Undeveloped vascular tissue
3. Xylem is mainly composed of vessels and phloem contains companion cell in angiosperms
4. Microspore grows into a pollen tube
Which of the following is not seen in red algae?
| 1. | 2 unequal flagella | 2. | Cellulose cell wall |
| 3. | Phycoerythrin | 4. | Floridean starch |
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The bryophytes are also called as the amphibians of plants kingdom mainly because:
1. they respire through the moist epidermis
2. they depend on water for sexual reproduction
3. they require more water than most plants
4. they lack true roots
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What is incorrect regarding bryophytes in general?
1. Sex organs are multicellular
2. Main plant body is haploid
3. Sporophyte is free living and photosynthetic
4. Zygotes do not undergo reduction division immediately
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Identify the incorrectly matched pair:
|
1. |
Numerical taxonomy |
Based on all observable characteristics |
|
2. |
Cytotaxonomy |
Based on chromosome number, structure and behavior |
|
3. |
Chemotaxonomy |
Based on chemotrophic mode of nutrition |
|
4. |
Phylogenetic system |
Based on evolutionary relationships |
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Which of the following would not be true regarding importance of algae?
1. They increase level of dissolved oxygen in water
2. Many can be used as food source
3. They are the source of most antibiotics known to man
4. Products like hydrocolloids [algin] and agar are useful to man
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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 |
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The given diagram shows:
1. Female thallus of Marchantia
2. Male thallus of Marchantia
3. Female thallus of Funaria
4. Male thallus of Funaria
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