Q. No.
A true statement for Ulothrix:
| 1. | Filamentous thallus and flagellated reproductive structures |
| 2. | Branched thallus |
| 3. | Flagellated cells absent |
| 4. | None of the above |
Sexual reproduction in Spirogyra is an advanced feature because it shows:
1. Different sizes of motile sex organs
2. Same size of motile sex organs
3. Morphologically different sex organs
4. Physiologically differentiated sex organs
In oogamy, fertilization involves:
| 1. | A large non-motile female gamete and a small motile male gamete |
| 2. | A large non-motile female gamete and a small non-motile male gamete |
| 3. | A large motile female gamete and a small non-motile male gamete |
| 4. | A small non-motile female gamete and a large motile male gamete |
The phenetic classification of organisms is based on:
| 1. | The ancestral lineage of existing organisms |
| 2. | Dendrogram based on DNA characteristics |
| 3. | Sexual characteristics |
| 4. | Observable characteristics of existing organisms |
Phylogenetic system of classification is based on:
1. evolutionary relationships
2. morphological features
3. chemical constituents
4. floral characters
Fusion of two motile gametes which are dissimilar in size is termed as
1. oogamy
2. isogamy
3. anisogamy
4. zoogamy
Which one of the following shows isogamy with non-flagellated gametes?
1. Sargassum
2. Ectocarpus
3. Ulothrix
4. Spirogyra
Read the following statements (A-E) and answer the question which follows them.
| A: | In liverworts, mosses, and ferns gametophytes are free-living |
| B: | Gymnosperms and some ferns are heterosporous |
| C: | Sexual reproduction in Fucus, Volvox and Albugo is oogamous |
| D: | The sporophyte in liverworts is more elaborate than that in mosses |
| E: | Both, Pinus and Marchantia are dioecious |
How many of the above statements are correct?
1. Two
2. Three
3. Four
4. One
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