41.What is pollination ? Name different types of pollination.
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42.What do you understand by double fertilization ?
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43.Give an account of significance of double fertilization.
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44.What is bagging technique ? How is it useful in plant breeding programmes ?
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45.What is meant by emasculation ? When and why does a plant breeder employ this technique ?
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46.Compare the structure of a non-endospermic (non-albuminous) seed with an endospermic (albuminous) dicot seed.
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47.
Differentiate between microsporogenesis and megasporogenesis. Which type of cell division occurs during these events ? Name the structures formed at the end of these two events.
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48.Arrange the following terms in a correct development sequence : Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gamete.
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49. What do you mean by monosporic development of female gametophyte ?
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50.With a neat diagram explain the 7-celled, Eight nucleate mature female gametophyte.
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