Q. No.Gametophyte in the pteridophytes is
(i) Small, inconspicuous.
(ii) Long lived, unicellular.
(iii) Mostly photosynthetic thalloid or saprophytic.
(iv) Short lived, haploid.
How many statements are correct with respect to gametophyte?
1. Two
2.Three
3. Four
4. One
(ii) Long lived, unicellular.
(iii) Mostly photosynthetic thalloid or saprophytic.
(iv) Short lived, haploid.
Development of the zygotes into young embryo takes within the female gametophytes in
1. Adiantum.
2. Selaginella.
3. Riccia.
4. Batrachospermum.
Select the wrong statement:
| 1. | Anisogametes differ either in structure, function or behaviour |
| 2. | In Oomycetes, the female gamete is smaller and motile, while the male gamete is larger and non-motile |
| 3. | Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy |
| 4. | Isogametes are similar in structure, function and behaviour |
Mannitol is a sugar alcohol. It is as stored food in:
1. Fucus
2. Gracillaria
3. Chara
4. Porphyra
Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of:
1. xerophytes
2. mesophytes
3. epiphytes
4. hydrophyte
1. Dryopteris
2. Salvinia
3. Adiantum
4. Equisetum
Rauwolfia serpentina is used in:
1. Curing high blood pressure
2. Kidney failure
3. Eye defect
4. Diabetes
In gymnosperms, the pollen chamber represents:
| 1. | a cell in the pollen grain in which the sperms are formed |
| 2. | a cavity in the ovule in which pollen grains are stored after pollination |
| 3. | an opening in the megagametophyte through which the pollen tube approaches the egg |
| 4. | the microsporangium in which pollen grain develop |
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