The arrangement of the nuclei in a normal embryo sac in the dicot plants is
$3 + 3 + 2$
$2 + 4 + 2$
$3 + 2 + 3$
$2 + 3 + 3.$
(c)
Double fertilization was discovered by
In which one of the following combinations $(a – d)$ the number of chromosomes of the present day hexaploid wheat is correctly represented?
Which of the following statement is correct?
$A$ : Certain proteins of pollen origin identifies the compatible stigma. $R$ : Compatibility proteins are found located in ektexine.
Double fertilization was first discovered by Nawaschin $(1898)$ in
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