Q. No.Pollen chamber present in gymnosperms represents
1. Microsporangium
2. Pollen grain cell where sperms are formed
3. Opening of megagametophyte for passage of pollen tube to egg
4. Cavity in nucellus for resting pollen grains after pollination
1. Microsporangium
2. Pollen grain cell where sperms are formed
3. Opening of megagametophyte for passage of pollen tube to egg
4. Cavity in nucellus for resting pollen grains after pollination
In which one of the following, male and female gametophytes do not have free living independent existence
| 1. | Polytrichum | 2. | Cedrus |
| 3. | Pteris | 4. | Funaria |
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The gametophyte is not an independent, free living generation in:
1. Polytrichum
2. Adiantum
3. Marchantia
4. Pinus
Consider the following four statements whether they are correct or wrong,
(A) The sporophyte in liverworts is more elaborate than that in mosses.
(B) Salvinia is heterosporous.
(C) The life-cycle in all seed-bearing plants is diplontic.
(D) In Pinus, male and female cones are borne on different trees.
The two wrong statements together are
| 1. (A) and (C) | 2. (A) and (D) |
| 3. (B) and (C) | 4. (A) and (B) |
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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
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