Cycas and Adiantum resemble each other in having:

1. Seeds

2. Motile sperms

3. Cambium

4. Vessels

Subtopic:  Pteridophytes: Heterospory | General Accounts of Gymnosperms: II | Gymnosperms |
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Compared with the gametophytes of the bryophytes, the gametophytes of vascular plants tends to be:
1. larger but to have smaller sex organs
2. larger and to have large sex organs
3. smaller and to have smaller sex organs
4. smaller but to have larger sex organs
Subtopic:  Pteridophytes: Heterospory |
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Which one of the following is considered important in the development of seed habit?

1.Dependent sporophyte2.Heterospory
3.Halplontic life cycle4.Free-living gametophyte
Subtopic:  Pteridophytes: Heterospory |
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Which one of the following is heterosporous?

1. Dryopteris

2. Salvinia

3. Adiantum

4. Equisetum

Subtopic:  Pteridophytes: Heterospory | Pteridophytes |
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Flagellated male gametes are present in all three of which one of the following sets?

1. Anthoceros, Funaria, and Spirogyra

2. Zygnema, Saprolegnia, and Hydrilla

3. Fucus, Marsilea, and Calotropis

4. Riccia, Dryopteris, and Cycas

Subtopic:  Bryophytes | Pteridophytes: Heterospory | Gymnosperms: I | Gymnosperms |
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In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result:

1. there is no change in the success rate of fertilization

2. there is a high degree of sterility

3. one can conclude that the plant is apomictic

4. self-fertilization is prevented

Subtopic:  Pteridophytes: Heterospory | Pteridophytes |
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