Tag: pollination and fertilization

Questions Related to pollination and fertilization

The process of transfer of pollen grains from anther to stigmatic surface of flower with the help of water is

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. Anemophily

  2. Hydrophily

  3. Zoophily

  4. Ornithophily

Show answer
Correct Option: B
Explanation:

The process of transfer of pollen grains from the anther to stigmatic surface of the flower with the help of water is hydrophily. Pollination by water is quite rare in flowering plants and is limited to about 30 genera, mostly monocots, e.g. freshwater plants like Vallisneria, Hydrilla; marine water plants like Zostera. Light unwettable pollen grains are present in these plants. Pollen grains are surrounded by mucilaginous covering, hence protected from wetting. Stigma is long, sticky and unwettable.

Pollination by water may occur at two places: 
  1. Epihydrophily: It occurs on the surface of the water. e.g. Vallisneria.
  2. Hypohydrophily: It occurs beneath the surface of the water. e.g. Zostera.

Choose the mismatched option.

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. Wind - Cannabis - Anemophily

  2. Water - Zostera - Hydrophily

  3. Insects - Salvia - Entomophily

  4. Birds - Adansonia - Ornithophily

  5. Bats - Kigelia - Chiropterophily

Show answer
Correct Option: D
Explanation:
• Pollination by means of wind is called Anemophily. Example, Cannabis.
• Pollination by means of water is called Hydrophily. Example, Zostera.
• Pollination by means of insects is called Entomophily. Example, Salvia.
• Pollination by means of birds is called Ornithophily. Example, Begonia.
• Pollination by means of bats is called Chiropterophily. Example, Kigelia.
Hence, the mismatched pair is D, because Adansonia is a plant which is pollinated by bats, not by birds.
So, the correct answer is D.

Pollination in Lotus is carried out by

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. Wind

  2. Water

  3. Insects

  4. All the above

Show answer
Correct Option: C
Explanation:
Lotus has bisexual flowers but anthers and stigma mature at different times so self pollination doesn't occur. Thus, Lotus is cross-pollinated by beetles. Beetles are attracted to the Lotus flower by the odour of the nectar. Beetle enter the flower at night and stays there for the whole night. The flower opens in the morning and beetle visits another flower at night. Thus, as the beetle visits different flowers, pollen from one flower are transferred to the stigma of different flowers because pollen get attached to the body of the beetles. Hence, this type of cross-pollination occurs in Lotus by means of insects i.e. beetles. So, the correct answer is C.

Entomophilous flowers are related to

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. Honey bees

  2. Wind

  3. Water

  4. Hairy Mammals

Show answer
Correct Option: A
Explanation:
Entomophilous flowers are the flowers that are pollinated by insects. From all the options given in the question, honey bees are the insects. So, entomophilous flowers are related to honey bees as honey bees pollinate them.
So, the correct answer is A.

Which of the following features is/ are common to both wind and water pollinated flowers?
I. Pollen grains are long and ribbon-like
II. Stigma is large and feathery
III. Flowers are not colourful
IV. Flowers do not produce nectar.

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. III and IV

  2. II and III

  3. I and II

  4. II

  5. I

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Correct Option: A

Butterflies pollinate

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. Bluish flowers

  2. Violet flowers

  3. Reddish flowers

  4. Purple flowers

Show answer
Correct Option: A
Explanation:
Butterflies are attracted to the flowers that are scented, showy and bright in color. Butterflies can see the colors in ultra violet range and their most preferred color of flowers for pollination is blue. Hence, butterflies pollinate bluish flowers.
So, the correct answer is A.

"Pollen grains are protected by a mucilaginous covering and having a specific gravity". This is characteristic of which type of pollination.

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. Anemophily

  2. Entomophily

  3. Hydrophily

  4. Zoophily

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Correct Option: C

Select the plants pollinated by water.
(a) Water Hyacinth
(b) Zostera
(c) Amorphophallus
(d) Vallisneria
(e) Yucca.

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. a, d and e

  2. b and e

  3. b and d

  4. b, c, d

  5. a, b and d

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Correct Option: C

Insects visit flowers to help in pollination.

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. True

  2. False

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Correct Option: A
Explanation:

Pollination is the transfer of pollen from a male part of a plant (anthers) to a female part of a plant (stigma), enabling later fertilisation and the production of seeds, most often by an animal or by the wind. Pollination is a very important part of the life cycle of plants. Entomophily or insect pollination is a form of pollination whereby pollen of plants, is distributed by insects. A major role of the insect is that of pollinator, meaning they transfer pollen from plant to plant (or sometimes within the same plant), which results in the development of a seed.

So the given statement is true.

Which one is applicable to insect pollinated flowers?

biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. Flowers are very small produced in large quantities

  2. Flowers are not prominent and without nectar

  3. Flowers are conspicuous and scented having nectar

  4. None of these

Show answer
Correct Option: C
Explanation:

When the flowers are pollinated by insects, it is called entomophily. Such flowers has evolved mechanisms to make themselves more appealing or conspicuous to insects by having bright colors or scented flowers, nectar or appealing shapes and patterns.
Thus, the correct answer is option (C), 'Flowers are conspicuous and scented having nectar'.