Explain why sexual reproduction in angiosperms is said to take place through double fertilization and triple fusion. Also draw a labelled diagram of embryo sac to explain the phenomena.

Draw a labelled diagram of the mature embryo sac of angiosperms.

Name the structure in leaves through which gaseous exchange takes place. Draw a labelled diagram of it.

Assertion :- ln Angiosperms, sexual reproduction takes place through the flower. Reason : All the parts of the flower are modification of stem

(a) Explain the process of microsporogenesis in angiosperms. (b) Draw a labelled diagram of a nature pollen grain.

(a) Explain the development of female gametophyte from a megaspore mother cell in an angiosperm. (b) Draw a labelled diagram of a fully developed embryo sac.

How does the megaspore mother cell develop into 7-celled, 8 nucleate embryo sac in an angiosperm? Draw a labelled diagram of a mature embryo sac.

How does the megaspore mother cell develop into 7-celled, 8 nucleate embryo sac in an angiosperm? Draw a labelled diagram of a mature embryo sac.

In angiosperms since two types of fusions, syngamy and triple fusion take place in __________ the phenomenon is termed double fertilisation.

a) Coconut palm is monoecious, while date palm is dioecious. Why are they so called? b) Draw a labelled diagram of sectional view of a mature embryo sac of an angiosperm.

(a) Explain the events taking place at the time of fertilization of an ovum in a human female. (b) Trace the development of the zygote upto the implanation in the uterus. (c) Name and draw a labelled sectional view of the embryonic stage that gets implanted.