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Pollination mechanisms and Floral Rewards MCQs Class 12 Biology with Answers:

1.

Wind pollination is common in:
A. Orchids
B. Legumes
C. Lilies
D. Grasses

Answer: D
Explanation: Wind pollination (anemophily) is most common in grasses, where pollen grains are light, dry, and produced in large quantities.

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2.

Anemophily type of pollination is found in:
A. Salvia
B. Bottle brush
C. Vallisneria
D. Coconut

Answer: D
Explanation: Anemophily refers to wind pollination, which occurs in plants like coconut where pollen is carried by air.

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3.

Chiropterophily means:
A. Wind pollination
B. Insect pollination
C. Snail pollination
D. Bat pollination

Answer: D
Explanation: Pollination carried out by bats is called chiropterophily.

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4.

Match fungi classes with examples:
A. (1-p, 2-s, 3-r, 4-q)
B. (1-q, 2-p, 3-s, 4-r)
C. (1-r, 2-p, 3-q, 4-s)
D. (1-r, 2-p, 3-s, 4-q)

Answer: D
Explanation: Correct matches are:
Phycomycetes → Albugo
Ascomycetes → Penicillium
Basidiomycetes → Puccinia
Deuteromycetes → Alternaria

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5.

Match pollination types:
A. A-o; B-m; C-q; D-n
B. A-m; B-q; C-n; D-o
C. A-n; B-o; C-m; D-q
D. A-q; B-p; C-o; D-n

Answer: C
Explanation:
Cleistogamy → Bud pollination
Geitonogamy → Same plant flowers
Entomophily → Insect pollination
Xenogamy → Cross pollination

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6.

Hydrophily is pollination by:
A. Air
B. Water
C. Animals
D. Self

Answer: B
Explanation: Hydrophily occurs in aquatic plants where water carries pollen

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7.

Unisexual flowers prevent:
A. Geitonogamy only
B. Autogamy only
C. Autogamy but not geitonogamy
D. Both geitonogamy & xenogamy

Answer: C
Explanation: Unisexual flowers cannot self-pollinate (autogamy), but pollination between flowers of the same plant (geitonogamy) is still possible.

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8.

Not a cross-pollination device:
A. Herkogamy
B. Dichogamy
C. Cleistogamy
D. Heterostyly

Answer: C
Explanation: Cleistogamy promotes self-pollination, as flowers do not open.

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9.

Assertion- Fig plant and Blastophaga wasp show a mutualistic relationship

Reason- The Blastophaga wasp gets a site for reproduction, while the fig flower gets pollination
A. Both true, R explains A
B. Both true, no explanation
C. A true, R false
D. A false, R true

Answer: A
Explanation: Fig and Blastophaga wasp show mutualism, where both benefit.

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10.

Type of association:
A. Mutualism
B. Commensalism
C. Cooperation
D. Co-evolution

Answer: A
Explanation: Both plant and insect benefit → mutualism.

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11.

Cleistogamy statements:
A. I false, II true
B. Both true
C. Both false
D. I true, II false

Answer: B
Explanation: Cleistogamous flowers are always self-pollinated and lack cross-pollination.

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12.

Incorrect statement:
A. Moths dominate pollination
B. Water pollination rare
C. Wind pollination common
D. Foul odour attracts flies

Answer: A
Explanation: Bees are the most dominant pollinators, not moths.

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13.

Pollination in water hyacinth:
A. Water only
B. Wind + water
C. Insects + water
D. Insects or wind

Answer: D
Explanation: Water hyacinth is pollinated by insects or wind, not water.

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14.

Incorrect for wind pollination:
A. Light pollen
B. Exposed stigma
C. Many ovules
D. Small flowers

Answer: C
Explanation: Wind-pollinated plants usually have one ovule, not many.

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15.

Transfer between different plants:
A. Cleistogamy
B. Xenogamy
C. Geitonogamy
D. Chasmogamy

Answer: B
Explanation: Xenogamy ensures genetic variation.

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16.

Floral rewards:
A. Nectar & pollen
B. Fragrance
C. Exudates
D. Colour

Answer: A
Explanation: Pollinators are attracted by nectar and pollen.

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17.

Incorrect statement:
A. Allergy pollen
B. Foul odour flowers
C. Honey from pollen
D. Nutrient pollen

Answer: C
Explanation: Honey is made from nectar, not pollen.

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18.

Genetically like autogamy:
A. Xenogamy
B. Apogamy
C. Cleistogamy
D. Geitonogamy

Answer: D
Explanation: Geitonogamy is genetically similar to self-pollination.

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19.

Transmission tissue found in:
A. Solid style
B. Dry stigma
C. Wet stigma
D. Hollow style

Answer: A
Explanation: Solid style contains transmitting tissue for pollen tube growth.

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20.

Pollination in Vallisneria:
A. Water carries flowers
B. Submerged
C. Insects
D. Wind

Answer: A
Explanation: Male flowers float and reach female flowers → epihydrophily.

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21.

Dioecious plants prevent:
A. Autogamy & xenogamy
B. Autogamy & geitonogamy
C. Geitonogamy & xenogamy
D. Cleistogamy

Answer: B
Explanation: Separate plants → no self-pollination possible.

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22.

Attractants needed for:
A. Wind
B. Insects
C. Water
D. Self

Answer: B
Explanation: Insects need visual and nectar rewards.

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23.

Few ovules → pollinated by:
A. Birds
B. Wind
C. Bees
D. Butterflies

Answer: B
Explanation: Wind pollination compensates with large pollen quantity.

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24.

Pollination occurs in:
A. Bryophytes
B. Pteridophytes
C. Angiosperms & Gymnosperms
D. Fungi

Answer: C
Explanation: Only seed plants require pollination.

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25.

Pollination in Rafflesia:
A. Carrion flies
B. Elephant
C. Bat
D. Crow

Answer: A
Explanation: Rafflesia emits foul smell to attract flies.

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26.

Rafflesia pollination type:
A. Sapromyophily
B. Ophiophily
C. Therophily
D. Amorphophallus

Answer: A
Explanation: Pollination by carrion flies = sapromyophily.

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27.

Mesogamy refers to:
A. Fusion
B. Gamete fusion
C. Entry via integuments
D. None

Answer: C
Explanation: Pollen tube enters through integuments.

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28.

Xenogamy is:
A. Cleistogamy
B. Allogamy
C. Autogamy
D. Homogamy

Answer: B
Explanation: Xenogamy is a type of cross-pollination (allogamy).

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29.

Ornithophily is pollination by:
A. Insects
B. Birds
C. Snails
D. Air

Answer: B
Explanation: Birds act as pollinators.

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30.

Zoophily means pollination by:
A. Invertebrates
B. Animals
C. Wind
D. Air

Answer: B
Explanation: Zoophily includes pollination by animals (vertebrates).

Conclusion on Pollination Mechanisms and Floral Rewards MCQs Class 12 Biology with Answers

In conclusion, Pollination mechanisms and floral rewards mcqs class 12 Biology with answers serve as a powerful learning tool for aspirants aiming to excel in their exams. They simplify complex concepts, improve retention, and enhance problem-solving skills. By consistently practicing Pollination mechanisms and floral rewards mcqs class 12 Biology with answers, aspirants can build confidence, achieve better results, and develop a deeper understanding of plant reproduction.