Question

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.

• A. $a,b$ and $c$
• B. $b,c$ and $d$
• C. $c,d$ and $d$
• D. $a,c$ and $e$

Answer 1

Answer: (D)

• Ovules generally differentiate a single megaspore mother cell (MMQ in the micropylar region of the Nucellus.
• In a majority of angiosperms, one of the megaspore remains functional while the other three degenerated.
• These mitotic division are strictly free nuclear, that is, nuclear division are not immediately followed by cell wall formation.