Q. No.
Study the figure and find out incorrect statement.
1. Contains laminarin or mannitol as reserve food.
2. Life-cycle is diplontic.
3. Union of gamete may take place in water or within the oogonium.
4. Gametes with two apically inserted flagella.
A Prothallus is
1. A structure in pteridophytes formed before the thallus develops
2. A sporophytic free living structure formed in pteridophytes
3. A gametophyte free living structure formed in pteridophytes
4. A primitive structure formed after fertilization in pteridophytes
Pinus seeds cannot germinate and establish without fungal association. This is because:
1. its seeds contain inhibitors that prevent germination.
2. its embryo is immature.
3. it has an obligate association with mycorrhizae.
4. it has a very hard seed coat.
From an evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:
| 1. | Gymnosperms | 2. | Liverworts |
| 3. | Mosses | 4. | Pteridophytes |
Choose the incorrect match from following:-
1. Cycas-branched stem.
2. Salvinia-heterosporous sporophyte.
3. Marchantia-Elaters.
4. Chlorella-used by space travellers.
Assertion(A): |
Seeds are formed in Gymnosperms. |
| Reason(R): | Female gametophyte is retained within megasporangium in Gymnosperms. |
| 1. | Both (A) and (R) are True, and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True, but (R) does not correctly explain (A) |
| 3. | (A) is True, but (R) is False |
| 4. | Both (A) and (R) are False |
Leafy stage develops from the secondary protonema as a
1. Apical bud
2. Axillary bud
3. Lateral bud
4. Meristem
The given diagram shows:
(1) An alga that lacks flagellated cells
(2) A liverwort
(3) A heterosporous pteridophyte
(4) A gymnosperm with non motile sperms
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