The chalazal pole is present:

An ovule in which the nucellus and embryo sac are placed at a right angle to the funicle is known as:

$A$ mature embryo sac at the final stage of development contains: (in $cells$)

For the formation of a tetrasporic embryo sac,how many megaspore mother cells are required?

Choose the correct sentence$(s)$.
$(I)$ Nucleus of the functional megaspore divides meiotically to form two nuclei.
$(II)$ After the $8$-nucleate stage,cell walls are laid down leading to the organization of a typical female gametophyte.
$(III)$ The egg apparatus consists of two synergids and one egg cell.
$(IV)$ Three cells at the chalaza end are called antipodal cells.

In an epigynous flower,what is the orientation of the micropyle?