Long Answer Type
Short Answer TypeName the parts of an angiosperm flower in which development of male and female gametophyte take place.
Explain any three advantages that seeds offer to angiosperms.
Seeds offer the following advantages to angiosperms:
(i) Seed formation is more dependable as the reproductive processes like pollination and fertilisation are independent of water.
(ii) The hard seed coat protects the young embryo from harsh environmental conditions.
(iii) Seed have better adaptive strategies for the dispersal to new habitats.
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.
Differentiate between albuminous and non-albuminous seeds, giving one example of each.
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