An alga which can be employed as food for human beings:
1. Ulothrix
2. Chlorella
3. Spirogyra
4. Polysiphonia
1. | Cycas | 2. | Equisetum |
3. | Psilotum | 4. | Pinus |
Development of the zygotes into young embryo takes within the female gametophytes in
1. Adiantum.
2. Selaginella.
3. Riccia.
4. Batrachospermum.
Mannitol is a sugar alcohol. It is as stored food in:
1. Fucus
2. Gracillaria
3. Chara
4. Porphyra
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
Mannitol is the stored food in:
1. Chara
2. Porphyra
3. Fucus
4. Gracillaria
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 |