In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result:
(1) there is no change in success rate of fertilization
(2) there is high degree of sterility
(3) one can conclude that the plant is apomictic
(4) self fertilization is prevented
Difficulty Level:
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
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Male gametes are flagellated in
1. Polysiphonia
2. Anabaena
3. Ectocarpus
4. Spirogyra
Difficulty Level:
The most primitive among the living vascular plants are the
(1) ferns
(2) brown algae
(3) mosses
(4) cycads
Difficulty Level:
Non flowering plants are included under
(1) cryptogamae
(2) phanerogamae
(3) angiosperms
(4) Both a and b
Difficulty Level:
Chlorophyll present in red algae is
(1) a, d
(2) a, b
(3) a, c
(4) b, c
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Shape of chloroplast present in Ulothrix is
(1) cup shaped
(2) girdle shaped
(3) star shaped
(4) diffused type
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This plant is used as a packing material and also forms an excellent fodder for feeding cattle.
(1) Medicago
(2) Pongamia
(3) Cratolaria
(4) All of these
Difficulty Level:
Maximum protein is present in (which is used as food in space)
(1) Chlorella
(2) Scendesmus
(3) Porphyra
(4) Spirulina
Difficulty Level:
Roots of higher plants show symbiosis with mycorrhiizas for obtaining
(1) sulphates
(2) nitrogen
(3) phosphates
(4) All of these
Difficulty Level: