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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMoss peat is used as a packing material for sending flowers and live plants to distant places because:
(1) it is easily available
(2) it is hygroscopic
(3) it reduces transpiration
(4) it serves as a disinfectant
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConifers differ from grasses in the :
(1) production of seeds from ovules
(2) lack of xylem tracheids
(3) absence of pollen tubes
(4) formation of endosperm before fertilization
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMale gametes are flagellated in
1. Polysiphonia
2. Anabaena
3. Ectocarpus
4. Spirogyra
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most primitive among the living vascular plants are the
(1) ferns
(2) brown algae
(3) mosses
(4) cycads
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyNon flowering plants are included under
(1) cryptogamae
(2) phanerogamae
(3) angiosperms
(4) Both a and b
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyChlorophyll present in red algae is
(1) a, d
(2) a, b
(3) a, c
(4) b, c
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology