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 majority of angiosperms

1.  egg has a filiform apparatus

2.  there are numerous antipodal cells

3.  reduction division occurs in the megaspore mother cells

4.  a small central cell is present in the embryo sac

Subtopic:  Pistil: Female Gametophyte |
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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
1. Hydrilla 2. Yucca
3. Banana 4. Viola

Subtopic:  Pollination & Outbreeding Devices |
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The ovule of an angiosperm is technically equivalent to:

1.  megasporangium

2.  megasporophyll

3.  megaspore mother cell

4.  megaspore

Subtopic:  Pistil: Ovule |
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Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:

1. Bee

2. Wind

3. Bat

4. Water

Subtopic:  Pollination & Outbreeding Devices |
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A dioecious flowering plant prevents both:

1. Autogamy and geitonogamy

2. Geitonogamy and xenogamy

3. Cleistogamy and xenogamy

4. Autogamy and xenogamy

Subtopic:  Pollination & Outbreeding Devices |
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Which one of the following statements is not true?
1. Exine of pollen grains is made up of sporopollenin
2. Pollen grains of many species cause severe allergies
3. Stored pollen in liquid nitrogen can be used in crop breeding programs
4. Tapetum helps in the dehiscence of anther

Subtopic:  Stamen: Anther |
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Proximal end of the filament of stamen is attached to the
1. connective
2. placenta
3. thalamus or petal
4. anther

Subtopic:  Stamen: Anther |
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The coconut water from tender coconut represents
1. fleshy mesocarp
2. free - nuclear proembryo
3. free - nuclear endosperm
4. endocarp

Subtopic:  Endosperm |
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Which of the following statements is not correct?

1. Insects that consume pollen or nectar without bringing about pollination are called pollen nectar robbers
2. Pollen germination and pollen tube growth are regulated by chemical compound of pollen interacting with those of the pistil
3. Some reptiles have also been reported as pollinators in some plant species
4. Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.

Subtopic:  Post Pollination Events |
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