A typical anther is

(a) Tetrasporangiate

(b) Tetragonal

(c) Trilobed

(d) Surrounded by four wall layers

The correct ones are

1. Only (a), (b) and (d)

2. Only (a) and (d)

3. Only (b) and (c)

4. All (a), (b), (c) and (d)

The anther wall layer which is usually polyploid and has dense cytoplasm as well as high DNA content is

1. Endothelium

2. Tapetum

3. Epidermis

4. Middle layer

Complete the below given schematic representation by choosing the correct option.

         A                  B                   C 

1. Mitosis   Microspore tetrad   Meiosis

2. Mitosis   Pollen grain           Meiosis

3. Meiosis   Pollen                   Syngamy

4. Meiosis   Pollen grain           Mitosis

Mark the wrongly matched pair

1. Amaranthus - Causes pollen allergy

2. Pollen banks - Store pollen at -196°C

3. Pea - Pollens are viable for only 30 minutes

4. Pollen grains - Rich in nutrients

In the following figure identify the parts labeled as A and B and select the option stating true features of them.

             A                                      B

1. Forms gametes                  Smaller in size

2. Stores food reserve           Irregular shaped nucleus

3. Irregular shaped nucleus     Spindle-shaped cell

4. Bigger in size                      Forms female gametes

Mark the wrong statement regarding egg apparatus

1. It is seven celled

2. It is found at the micropylar end of the ovule

3. Its cells are haploid

4. It contains single egg cell

In an embryo sac, the cells that degenerate after
fertilisation are

(1) Synergids and primary endosperm cell

(2) Synergids and antipodals

(3) Antipodals and primary endosperm cell

(4) Egg and antipodals

Largest cell in embryo sac of angiosperm is

1. Synergid cell

2. Egg

3. Antipodal cell

4. Central cell

The entry of pollen tube into the embryosac takes place due to the chemo-attractant secreted by

1. Tapetum

2. Oosphere

3. Filiform apparatus

4. Antipodal

Select the option in which both organisms cannot complete their life cycle without each other

1. Snake – Santalum

2. Ficus – Bats

3. Moth – Yucca

4. Aquilegia – Amorphophallus