Porogamy

Q.

Name the parts of an angiosperm flower in which development of male and female gametophyte take place.

Q.

Name the parts of the flower of an angiosperm in which development of male and female gametophyte take place.

Q.

What is the direction of the micropyle in the anatropous ovule?

1. Downward

2. Upward

3. Left

4. Right

Q. Porogamy is the entry of the pollen tube through

1. funicle
2. micropyle
3. chalaza
4. integuments

Q.

what is a antipodal cell ? how does it look like?

Q.

The pollen tube usually enters the embryo sac

1. Through one of the synergids.

2. By directly penetrating the egg.

3. Between one synergid and central cell.

4. By knocking off the antipodal cells.
   

Q.

What is micropylar end?

Q.

State whether the following statement is correct or incorrect:
An egg is fertilised in an ovule.

Q. What is called filiform apparatus?

Q. In porogamy, the pollen tube enters the ovule through.

1. Funicle
2. Micropyle
3. Chalaza
4. Integuments

Q. Function of guiding and attracting pollen tube is done by.

1. Egg cell
2. Filiform apparatus
3. Antipodal cells
4. Secondary nucleus

Q. Function of synergids is to

1. Attract pollen tube and bear its shock
2. Fuse with extra male gametes and form endosperm
3. Produce additional embryo
4. Protect egg from pathogens

Q. An important function of the synergids in the embryo sac is to.

1. Push the pollen tube into the egg
2. Nourish the embryo
3. Serve as the seat of pollen tube discharge
4. Protect the egg from damage by the pollen tube

Q. What does filiform apparatus do at the entrance into ovule?

1. It opens the pollen tube.
2. It guides the pollen tube from synergid to egg.
3. It helps in entry of pollen tube into synergid.
4. It prevents entry of more than one pollen tube into embryo sac.

Q. In porogamy, pollen tube enters ovules through

1. Micropyle
2. Chalazal end
3. Ovary wall
4. Integument

Q. Through which cell of the embryo sac, does the pollen tube enter the embryo sac-

1. Persistant synergid
2. Egg cell
3. Central cell
4. Degenerated synergid

Q. Route used by pollen tube for entering ovule is

1. Integument
2. Micropyle
3. Chalaza
4. Any of the above

Q. Through which route, the pollen tube enters the ovule?

1. Chalaza
2. Micropyle
3. Funiculus
4. All of the above

Q.

The pollen tube usually enters the embryo sac

1. Through one of the synergids.

2. By directly penetrating the egg.

3. Between one synergid and central cell.

4. By knocking off the antipodal cells.
   

Q. In mesogamy, pollen tube enters the ovule through

1. Chalaza
2. Middle of integuments without piercing the tissues
3. Middle of integuments after piercing the tissues
4. Middle of micropyle

Q. The filiform apparatus is present in ________.

1. Egg cell
2. Secondary nucleus
3. Synergids
4. Antipodals

Q.
Name the term used for entry of pollen tube through the integument.

Q. During spermatogenesis, Golgi is thought to be responsible for the formation of

1. Acrosome
2. Tail
3. Myeloid piece
4. Head

Q. The pollen tube can pass in between the egg cells, egg cell and synergid cells and antiopodal cells.
is the statemenent true. Give reasons.

Q. What is wrong?

1. Obturator occurs in the ovary
2. Grass pollen grains are monosiphonous
3. Tip of pollen tube contains dense cytoplasm
4. Tip of the pollen tube contains callose plugs

Q. When pollen tube enters through the funiculus or the base of the ovule, it

1. Chalazogamy
2. Mesogamy
3. Isogamy
4. Porogamy

Q. Choose the correct answers from the alternatives given.
Entrance of a pollen tube into an ovule through the micropyle is called

1. porogamy
2. mesogamy
3. chalazogamy
4. apogamy

Q. The entry of pollen tube into the ovule through micropyle is called

1. mesogamy
2. chalazogamy
3. \N
4. porogamy

Q. Entry of pollen tube through micropyle is

1. Mesogamy
2. Chalazogamy
3. Porogamy
4. Pseudogamy

Q. Chalazogamy occurs in

1. Populus
2. Casuarina
3. Lily
4. Cucurbita