Long Answer Type
Short Answer TypeName the parts of an angiosperm flower in which development of male and female gametophyte take place.
Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.
Long Answer Type(a) Draw a diagrammatic sectional view of a mature anatropous ovule and label the following parts in it:
(i) that develops into seed coat.
(ii) that develops into an embryo after fertilization.
(iii) that develops into an endosperm in an albuminous seed.
(iv) through which the pollen tube grains entry into the embryo sac.
(v) that attaches the ovule to the placenta.
(b) Describe the characteristic features of wind pollinated flowers.Short Answer TypeMention the unique flowering phenomenon exhibited by Strobilanthus kunthiana (neelakuranaji).
Where is sporopollenin present in plants? State its significance with reference to its chemical nature.
Sporopollenin is present in exine of pollen grains in plants. It is one of the most resistant organic substances and can withstand high temperature, strong acids and alkali. No enzyme has been found that degrades sporopollenin is so far known. This sporopollenin helps the pollen grain to be well preserved.
Differentiate between albuminous and non-albuminous seeds, giving one example of each.
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