Wind pollinated flowers are Options (a) small, brightly coloured, producing large number of pollen grains (b) small, producing large number of dry pollen grains (c) large producing abundant nectar and pollen (d) small, producing nectar […]
Which one of the following statements is wrong? Options (a) When pollen is shed at two-celled stage, doubled fertiliztion does not take place (b) Vegetative cell is larger thean generative cell (c) Pollen graints in […]
Which one of the following statements is correct? Options (a) Geitonogamy involves the pollen and stigma of flowers of different plants (b) Clestogamous flowers are always autogamous (c) Xenogamy occurs only by wind pollinations (d) […]
What does the filiform apparatus do at the entrace into ovule? Options (a) It helps in the entry of pollen tube into a synergid (b) It prevents entry of more than one poller tube into […]
Which of the following statements about Sporopollenin is correct? Options (a) Sporopollenin can withstand high temperatures but not strong acids (b) Sporopollenin can be degraded by enzymes (c) Sporopollenin is made up of inorganic materials […]
Which one of the following statements is not true about somatic embryogenesis? Options (a) A somatic embryo develops from a somatic cell (b) The pattern of development of a somatic embryo is comparable to that […]
Which one of the following statements is correct? Options (a) sporogenous tissue is haploid (b) Endothecium produces the microspores (c) Tapetum nourishes the developing pollen (d) Hard outer layer of pollen is called intine Correct […]
Which one of the following pairs of plant structures has haploid number of chromosomes? Options (a) Megaspore mother cell and antipodal cells (b) Egg cell and antipodal cells (c) Nucleus and antipodal cells (d) Egg […]
Select the wrong statement about repdroduction Options (a) Anisogametes differ either in structure, function or behaviour (b) In Oomycetes female gamete is smaller and motile, while male gemete is larger non-motile (c) Chalmydomonas exhibits both […]
Monoecious plant of Chara shows occurrence of : Options (a) stamen and carpel of the same plant (b) upper antheridium and lower oogonium on the same plant (c) upper oogonium and lower antheridium on the […]
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