With a neat digram explain the 7-celled , 8-nucleate nature of the female gametophyte.

With a neat labelled diagram explain the 7 celled 8 nucleate nature of the female gametophyte.

First haploid cell of female gametophyte is

Read the following statements and find out the incorrect statements. a. Ovules generally differentiate a single megaspore mother cell (MMC) in the chalazal region of the nucellus. b. The MMC undergoes reduction division and produces four megaspores. c. In a majority of angiosperms, one of the megaspore is degenerated while the other three remains functional. d. The nucleus of the functional megaspore divides mitotically three times and form 2-nucleate, 4-nucleate and later 8-nucleate stages of the embryo sac. e. These mitotic division are strictly free nuclear, that is, nuclear division are immediately followed by cell wall formation.

If birth to a male child and birth to a female child are equal-probable, then what is the probability that at least one of the three children born to a couple is male ? a) 4/5 b) 7/8 c) 8/7 d) 1/2