Double fertilization is different from single fertilization because of the presence of

1. Syngamy

2. Seed

3. Triple fusion

4. Megaspore and micropore

Subtopic:  Double Fertilization |
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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

Subtopic:  Post Pollination Events | Double Fertilization |
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Double fertilization is exhibited by:

1. Algae

2. Fungi

3. Angiosperms

4. Gymnosperms

Subtopic:  Double Fertilization |
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Double fertilization is:
1. Fusion of two male gametes of a pollen tube with two different eggs
2. Fusion of one male gamete with two polar nuclei
3. Fusion of two male gametes with one egg
4. Syngamy and triple fusion
Subtopic:  Double Fertilization |
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In double fertilization total number of male nuclei and total number of female nuclei involved are:

(1) 3, 2 respectively                          

(2) 2, 3 respectively

(3) 2, 2 respectively                          

(4) 3, 3 respectively

Subtopic:  Double Fertilization |
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Double fertilization involves

(1) fertilization of the egg by two male gametes

(2) fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube

(3) fertilization of the egg and the central cell by two sperms brought by different pollen tubes

(4) fertilization of the egg and the central cell by two sperms brought by the same pollen tube.

Subtopic:  Double Fertilization |
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After double fertilizaton, a mature ovule has

(1) 1 diploid and 1 haploid cell

(2) 1 diploid and 1 triploid cell

(3) 2 haploid and 1 triploid cell

(4) 1 haploid and 1 triploid cell

Subtopic:  Double Fertilization |
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The central cell in the embryo sac, after triple fusion, becomes:

(1) Primary endosperm cell

(2) Endosperm

(3) Embryo

(4) Zygote

Subtopic:  Double Fertilization |
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Which of the following statements is false about filiform apparatus?

1. The synergids have special cellular thickenings at the micropylar tip called filiform apparatus

2. It plays an important role in guiding the pollen tubes into the synergid

3. Both 1 and 2

4. Pollen tube stimulates the formation of filiform apparatus

Subtopic:  Double Fertilization |
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Triple fusion involves the fusion of:-

1. Two male gametes and one egg cell

2. Two egg cell and one male gamete

3. Two male gametes and secondary nucleus

4. One male gamete and secondary nucleus

Subtopic:  Double Fertilization |
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