The arrangement of the nuclei in a normal embryo sac in the dicot plants is:

1. 2+4+2

2. 3+2+3

3. 2+3+3

4. 3+3+2

In a cereal grain, the single cotyledon of the embryo is represented by:

1. coleorhiza

2. scutellum

3. prophyll

4. coleoptiles

Rarely among angiosperms, the pollen grains influenced the endosperm. This is called as:

1. Meta xenia

2. nemec phenomenon

3. Xenia

4. Mesogamy

The following is the diagram of TS of Anther. Identify the parts labelled as A, B and C.

1. A-Epidermis, B-Endothecium, C-Spongenous

2. A-Endothecium, B-Connective, C-Pollengrain

3. A-Pollen grain, B-Connective, C- Endothecium

4. None of the above

 
In the given diagram, parts labeled as A, B, C, D, E and F are respectively identified as:

1. synergids, polar nuclei, central cell, antipodals, filiform apparatus and egg

2. polar nuclei, egg, antipodals, central cell, filiform apparatus and synergids

3. egg, synergids, central cell, filiform apparatus, antipodals and polar nuclei

4. central cell, polar nuclei, filiform apparatus, antipodals, synergids and egg

In some organisms, karyokinesis is not followed by cytokinesis as a result of which, the multinucleate condition arises leading to the formation of the syncytium. The perfect example for this is:

1. Appearance of a furrow in cell membrane

2. Liquid endosperm in coconut

3. Sexual reproduction

4. Fertilization

Double fertilization occurs in:

1. Riccia

2. Pteridium

3. Cycas

4. Capsella

Persistent nucellus in the seed is known as: