Q. No.Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because:
1.
Female gametophyte is free and gets dispersed like seeds.
2.
Female gametophyte lacks archegonia.
3.
Megaspores possess endosperm and embryo surrounded by seed coat.
4.
Embryo develops in female gametophyte which is retained on parent sporophyte.
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Examine the figure given below and select the right option giving all the four parts (a, b, c and d) correctly identified.
| (a) | (b) | (c) | (d) | |
| 1. | Archegoniophore | Female thallus | Gemma cup | Rhizoids |
| 2. | Archegoniophore | Female thallus | Bud | Foot |
| 3. | Seta | Sporophyte | Protonema | Rhizoids |
| 4. | Antheridiophore | Male thallus | Globule | Roots |
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Which one of the following is common to multicellular fungi, filamentous algae and protonema of mosses?
1. Diplontic life cycle
2. Members of kingdom plantae
3. Mode of Nutrition
4. Multiplication by fragmentation
Cycas and Adiantum resemble each other in having :
1. Seeds
2. Motile Sperms
3. Cambium
4. Vessels
Gymnosperms are also called soft wood spermatophytes because they lack :
1. Cambium
2. Phloem fibres
3. Thick-walled tracheids
4. Xylem fibres
Which one of the following is a correct statement?
1. Pteridophyte gametophyte has a protonemal and leafy stage
2. In gymnosperms, female gametophyte is free-living
3. Antheridiophores and archegoniophores are present in pteridophytes
4. Origin of seed habit can be traced in pteridophytes
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Isogamous condition with non-flagellated gametes is found in:
1. Spirogyra
2. Volvox
3. Fucus
4. Chlamydomonas
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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 |
Which one of the following shows isogamy with non-flagellated gametes?
1. Sargassum
2. Ectocarpus
3. Ulothrix
4. Spirogyra
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An alga which can be employed as food for human beings :
1. Ulothrix
2. Chlorella
3. Spirogyra
4. Polysiphonia
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