Primary endosperm nucleus (PEN) is formed by the fusion of

1. 2 polar nuclei + 1 synergid cell nucleus

2. 1 polar nucleus + 1 antipodal cell nucleus + 1 synergid cell nucleus

3. 2 polar nuclei + 1 male gamete nucleus

4. 2 antipodal cell nuclei + 1 male gamete nucleus

Identify the parts labelled A, B, C and D in the given figure and select the correct option.

Match column I with column II and select the correct option from the given codes.

1. A - (iv), B - (ii), C - (iii), D - (i)

2. A - (iii), B - (ii), C - (i), D - (iv)

3. A - (i), B - (iv), C - (iii), D - (ii)

4. A - (ii), B - (iii), C - (i), D - (iv)

The following is the diagram of T.S. of anther. Identify the parts labelled A, B and C.

Which one of the most common embryo sac in flowering plant?

1. Monosporic, 8 nucleated and 7 celled

2. Monosporic, 7 celled and 7 nucleated

3. Bisporic, 8 nucleated and 7 celled

4. Bisporic, 7 celled and 8 nucleated

The normal type of embryo sac is 8-nucleated and

1. 8-celled

2. 7-celled

3. 6-celled

4. 5-celled

Embryo sac is

1. megaspore

2. microgametophyte

3. female gametophyte

4. megasporangium

In some seeds, reminants of nucellus are also presistent. This residual, persistent nucellus is the

1. pericarp

2. perisperm

3. chalazosperm

4. mesosperm

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