question_answer

Directions 46 - 50

Read the passage given below and answer the following questions.

The typical ovule is attached to the paren chymatous cushion placenta by means of funicle. The body of the ovule fuses with funicle in the region called hilum Funicle has vascular strand for the supply of nourishment to the ovule. Thus, hilum represents the junction between ovule and funicle. Each ovule has one or two protective envelopes called integuments. Integuments encircle the ovule except at the tip where a small opening called the micropyle is organised. Opposite the micropylar end, is the chalaza, representing the basal part of ovule. Enclosed within the integuments is a mass of parenchymatous cells called the nucellus. Cells of the nucellus have abundant reserve food materials. Inside the nucellus is the development of embryo sac or female gametophyte. An ovule generally has a single embryo sac formed from a megaspore.

In flowering plants archesporium gives rise to :

A) Wall of sporangium

B) Both wall and sporogenous cells

C) Tapetum and sporogenous cells

D) Wall and taperum