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Q. No.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
| 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | Hydrilla | 2. | Yucca |
| 3. | Banana | 4. | Viola |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe ovule of an angiosperm is technically equivalent to:
1. megasporangium
2. megasporophyll
3. megaspore mother cell
4. megaspore
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFlowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:
1. Bee
2. Wind
3. Bat
4. Water
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA dioecious flowering plant prevents both:
1. Autogamy and geitonogamy
2. Geitonogamy and xenogamy
3. Cleistogamy and xenogamy
4. Autogamy and xenogamy
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology2. 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology2. placenta
3. thalamus or petal
4. anther
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology2. free - nuclear proembryo
3. free - nuclear endosperm
4. endocarp
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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.
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