Question

i) What is triple fusion? Where and how does it take place? Give the name of nuclei involved in triple
fusion. What is the product of this process?

(ii) Which of the following, an endosperm or an embryo, develops first in an angiospermic seed? Givereason for the precedence.

(iii) State the role of endosperm in mature albuminous seed.

(iv) Draw a labelled diagram of a mature dicotyledonous embryo​

Answer 1

Explanation:

1) Triple fusion is fusion which involves the fusion of two polar nuclei and a sperm nucleus which occurs in double fertilisation in a seed plant and it further results in the formation of endosperm. This process occurs in the embryo sac of the angiosperms.

2) Endosperm provides nourishment to the developing embryo thus, embryo development starts after an endosperm is formed. The main role of endosperm is to provide food for growing embryo.

3) Endosperm function as a storage house . it stores food for the growing embryo in nature seeds