Choose correct sentence.
$(I)$ Nucleus of the functional megaspore divides meiotically to form two nuclei.
$(II)$ After $8$ nucleate stage, cell walls are laid down leading to organization of typical female gametophyte
$(III)$ The egg apparatus, consists of two synergids and one egg cell.
$(IV)$ Three cells are at the chalaza end are called antipodal cells.
Only $I$ and $II$
Only $II, III$ and $IV$
Only $I$ and $IV$
$I, II, III, IV$
What does the filiform apparatus do at the entrance into ovule?
The cells in embryo sac which act as haustoria are
$A$ : Anatropous ovule is resupinate ovule.
$R$ : The body of ovule is completely bent with hilum close to micropylar end.
The haploid cell which divides by mitosis to form embryosac is
What is meant by monosporic development of female gametophyte?