NEET: Multiple Choice question: Pollen Pistil Interaction and Double Fertilisation

1. Self incompatibility refer to  the acceptance of pollen grain  by Pistil of 

A. Other species of plant

B. Same plant

C. Other plant of same species

D. Of other flower of same plant

Answer : C Explanation 

2. Which of the following statement is  not correct. 

A. Pistill accept pollen grain of other flower of same plant and allow germination of pollen tube.

B. The ability of pistil to recognise the pollen and than its acceptance and rejection is a continous dialogue between pollen and pistil.

C. The Dialogue between pollen grain and pistill is mediated by chemical component.

D. Pistill accept compatible pollen grain or right type and reject incompatible or wrong type pollen grain.

Answer : A Explanation 

3. Compatible pollen germinates on stigma to produce pollen tube through the :

A. Germ Pore

B. Exine 

C. Intine

D. All of the above.

Answer : A Explanation 

4. Consider the following statement and select the correct code.

1. Generative cell of two stage of pollen grain divide at time on landed on stigma and form two male gamete.

2. Pollen grain at 3 celled stage has two male gamete since beginning.

3.Pollen tube grow through the tissue of stigma and style and reaches the ovary.

A. Only 3     B. 1 and 4

C  2 and 3   D. 1,2 and 3

Answer : D Explanation 

5. Consider the following statement and select the correct code :

1. Pollen tube reaches ovary and enters into ovule through micropyle.

2. Pollen tube  enters one of the two synergid and through the filiform appratus.

A. Only 1      B. Only 2

C. Both 1 and 2 

D. Neither 1 nor 2

Answer : C Explanation 

6. Filiform appratus help in Guiding of 

A.  Growth of pollen tube

B.   Entry of pollen tube

C. Divison of generative cell

D. All of the above 

Answer: B Explanation 

7. Pollen pistil interaction include the event from pollen deposition till

A. Growth of pollen tube

B. Entery of pollen tube in ovule

C. Recognition of compatible pollen grain

D. Release of sugar solution for germination  of pollen grain.

Answer : B Explanation 

8. When a pollen tube makes entry through the ---------- into the ovule, it is called porogamy.

A. Chalaza B. Micropyle

C. Integument D. Funicle

Answer: B Explanation

9. After the entry of pollen tube, two male gamete are discharged in to

A. Ovule B. Ovary

C. Cytoplasm of synergid

D. Filiform appratus

Answer: C Explanation

10. Fusion of one male gamete with egg cell to form a diploid zygote is called

A. Syngamy

B. Double fertilisation

C. Triple fusion

D. Binary fusion

Answer: A Explanation

11. Another male gamete of pollen tube fuse with both polar nuclei and form Primary endosperm nucleus. This fusion is called

A. A. Syngamy

B. Double fertilisation

C. Triple fusion

D. Fertilisation

Answer : C Explanation

12. Which one of the following statement is correct.

A. Two fusion, syngamy and triple fusion takes place in embryo sac therefore, called double fertilisation.

B. Double fertilisation is unique feature of Angiosperm

C. Nawaschin discovered the double fertilisation.

D. All of the above

Answer: D Explanation

13. Primary endosperm nucleus which form endosperm is

A. Haploid

B. Diploid

C. Triploid

D. Tetraploid

Answer: C Explanation