What is the correct sequence of the formation of female gametophyte in angiosperms?

(1) Nucellus, megapore tetrad, megaspore mother cell, megaspore, female gametophyte

(2) Megaspore tetrad, nucellus, megaspore mother cell, megaspore, female gametophyte

(3) Nucellus, megaspore mother cell, megaspore tetrad, megaspore, female gametophyte

(4) Megaspore mother cell, megaspore tetrad, megaspore, nucellus, female gametophyte

Which among the following is attached to the proximal end of filament?

(1) Stamen

(2) Anther

(3) Petal

(4) Pollen sac

A typical angiosperm bilobed and dithecous anther consists of how many theca?

(1) Two

(2) Four

(3) Eight

(4) Three

What is the number of microsporangia in each lobe of an angiosperm anther?

(1) Four

(2) Two

(3) Eight

(4) One

Which among the following extend longitudinally to become pollen sac?

(1) Microsporangia

(2) Filament of anther

(3) Tapetum

(4) Endothecium

All of the following statements are correct except:

(1) The proximal end of the filament is attached to the thalamus or the petal of the flower.

(2) The anther is a four-sided structure consisting of four microsporangia, two in each lobe.

(3) The number and length of stamens are variable in flowers of different species.

(4) In a longitudinal section, a typical microsporangium appears near circular in outline.

A, B, C and D in the following diagram respectively are:

(1) Epidermis, endothecium, middle layers, tapetum

(2) Epidermis, middle layers, PMC, tapetum

(3) Endothecium, middle layers, microspore mother cells, tapetum

(4) Epidermis, middle layers, tapetum, PMC

Which among the following is not a characteristic feature of sporopollenin?

(1) Sporopollenin is one of the most resistant organic material known.

(2) It can withstand high pressures.

(3) No enzyme that degrades sporopollenin is known.

(4) The exine exhibits a fascinating array of patterns and designs.

Megasporangium is equivalent to:

(1) Embryo sac

(2) Ovary

(3) Nucellus

(4) Ovule

The above diagram shows some stages in microgametogenesis. Identify A, Band C:
               A                               B                              C
(1) Symmetric spindle        Generative cell           Vegetative cell

(2) Symmetric spindle        Vegetative cell           Generative cell

(3) Asymmetric spindle       Vegetative cell           Generative cell

(4) Asymmetric spindle       Generative cell           Vegetative cell