Which one of the following is considered important in the development of seed habit?
(1) Dependent sporophyte
(2) Heterospory
(3) Haplontic life cycle
(4) Free-living gametophyte
In which one of the following, the male and female gametophytes don't have free-living independent existence?
(1) Pteris
(2) Funaria
(3) Polytrichum
(4) Cedrus
Which one of the following is heterosporous?
(1) Dryopteris
(2) Salvinia
(3) Adiantum
(4) Equisetum
If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?
(1) Types of pigments present in the cell
(2) Nature of stored food materials in the cell
(3) Structural organisation of thallus
(4) Chemical composition of the cell wall
In a moss, the sporophyte:
(1) is partially parasitic on the gametophyte
(2) produces gametes that give rise to the gametophyte
(3) arises from a spore produced from the gametophyte
(4) manufactures food for itself, as well as for the gametophyte
Which one of the following statements is wrong?
(1) Algin and carrageenan are products of algae
(2) Agar-agar is obtained from Gelidium and Gracilaria
(3) Chlorella and Spirulina are used as space food
(4) Mannitol is stored food in Rhodophyceae
Male gametes are flagellated in
1. Polysiphonia
2. Anabaena
3. Ectocarpus
4. Spirogyra
The most primitive among the living vascular plants are the
(1) ferns
(2) brown algae
(3) mosses
(4) cycads
Chlorophyll present in red algae is
1. | a, d | 2. | a, b |
3. | a, c | 4. | b, c |
Algae are useful because they
(1) are large in number
(2) are used in alcoholic fermentation
(3) purify the atmosphere
(4) are used in curdling of milk