$A$ : Growth of male gametophyte is completed over the female reproductive organ.
$R$ : $2-$celled stage of partial male gametophyte is developed in-situ.
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
If the cells of root in wheat plant have $42$ chromosomes, then the no. of chromosome in the cell of pollen grain is
Identify $A$ and $B$ in diagram given below:
Tapetum is a part of
Identify labelled part $'X'$ from the figure :
Examine the figure given below and select the right option giving all the four parts $a, b, c$ and $d.$ Correctly identify
$a\quad \;b\quad\;c\quad\;d$