Triple Fusion

Q.

Since pollen grains are light, they are easily carried by water from flower to flower for pollination.

1. True
2. False

Q.

Double fertilization is a characteristic feature in which division of the plant kingdom?

1. Angiosperm

2. Bryophyta

3. Gymnosperm

4. Pteridophyta

Q.

The male gamete and the female gamete fuse to form the zygote in the __________.

Q.

The two synergid cells and a female gamete/egg cell formed at the micropylar end is collectively called as_______

1. spindle apparatus

2. egg apparatus

3. fertilization apparatus

4. none of these

Q.

Which of the following processes occurs only in angiosperms?

1. Fusion of male and female gametes inside the plant body.
   

2. Presence of male and female sexual organs on different plants.
   

3. Development of zygote inside the plant body.

4. Formation of secondary nucleus by fusion of two polar nuclei.
   
   

Q.

Single cell formed by the fusion of male and female gametes

Q.

State whether the following statement is correct or incorrect:
Sexual reproduction takes place only in animals and not in plants.

Q.

Define the following term:

Fertilisation

Q. Which of the given options shows a mature female gametophyte in angiosperms?

1. 2 cells: micropylar end; 2 cells: antipodal end; 2 cells: centre
2. 3 cells: antipodal end; 3 cells: micropylar end; 1 cell: centre
3. 3 cells: antipodal end; 2 cells: micropylar end; 1 cell: centre
4. 3 cells: antipodal end; 4 cells: micropylar end; 2 cells: centre

Q. Which of the following structures are haploid in gymnosperms?

1. Leaf, root, integument
2. Pollen grain, megaspore, embryo
3. Megaspore, leaf, root
4. Pollen grain, megaspore, endosperm

Q. How is double fertilization significant to angiosperms and how has this event led to the successful evolution of angiosperms?

Q.

Triple fusion in angiosperms is a phenomenon that involves fusion of

1. Single male gamete with single polar nucleus

2. Single male gamete with two polar nuclei

3. Single female gamete with two polar nuclei

4. Single female gamete with single polar nucleus

Q. Assertion :Female gametophyte in angiosperm is eight nucleate. Reason: Double fertilisation occurs in angiosperms.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

III Give one word for the following:

8. The process of fusion of male and female gametes.