Tag: pollination, fertilization and development of endosperm and embryo

Questions Related to pollination, fertilization and development of endosperm and embryo

"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'.

The insect Blastophaga grossorum is associated with the pollination of

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

  1. Mango

  2. Ficus

  3. Paddy

  4. Nelumbium

Show answer
Correct Option: B
Explanation:
There is a tight mutual dependence between the Ficus species and an insect called Blastophaga grossorum that pollinates it. It is known as Coevolution. This relationship has developed and is persistent for millions of years now.
So, the correct answer is, 'Ficus'.

Match column I with column II and select the correct option from the given codes.

Column I Column II
A. Anemophily (i) Grasses, Date palm
B. Hydrophily (ii) Rose, Jasmine
C. Entomophily (iii) Butea, Bignonia
D. Omithophily (iv) Vallisneria, Ceratophylium
biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

  1. A-(i), B-(iv), C-(ii), D-(iii)

  2. A-(i), B-(iv), C-(iii), D-(ii)

  3. A-(ii), B-(iii), C-(i), D-(iv)

  4. A-(ii), B-(i), C-(iii), D-(iv)

Show answer
Correct Option: C
Explanation:

Anemophily

It is a form of pollination when pollen grains are distributed by wind. Also, called the anemophilous flower.
Anemophilous pollen grains are light and non-sticky. So, that it can be transferred by air currents. Wind-pollinated flowers are inconspicuous and they not showy and also devoid of nectar etc. as seen in grass
Hydrophily
It is a form of pollination when the pollination takes place through the agency of water.
It is of two types :
Hydrophily: Plants which are pollinated inside the water. e.g. Zoster, Ceratophyllum
Epihydrophilly: Plants which are pollinated outside the water or on the surface of the water. e.g. Vallisneria
Entomophily 
It is a type of pollination, which takes py insect. Insect-pollinated flowers are made attractive in different ways and the pollens are sticky with a rough surface. So, that they may easily stick to insect limbs. e.g. Rose
Ornithophily 
It is the form of pollination when the pollination takes place by birds. e.g. Begonia, Bottlebrush, Butea
So, the correct option is 'C'

Which of the following is pollinated by water?

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

  1. Viola

  2. Yucca

  3. Oxalis

  4. Commelina

  5. Zostera

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Correct Option: E
Explanation:

  • Zostera is the marine seagrass which gets pollinated by water. Pollens are released in water and capture by stigmas.
  • In Viola, the flowers get pollinated by bees.
  • In Oxalis and Commelina, there is no need for pollinator as they are closed flowers. There is no chance of cross-pollination. 
  • In Yucca, the flowers are pollinated by yucca moth.
So, the correct option is 'Option E'.

Vallisneria spiralis is a classical example of

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

  1. Epihydrophily

  2. Hypohydrophily

  3. Anemophily

  4. Chiropterophily

Show answer
Correct Option: A
Explanation:

Pollination is the transfer of pollen from a male part of a plant (anther) 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. Hydrophily is a fairly uncommon form of pollination whereby pollen is distributed by the flow of waters, particularly in rivers and streams. Epihydrophily is a pseudo hydrophily that occurs on the surface of the water. Vallisneria pollen grains are released on the surface of the water, which are passively carried away by water currents; some of them eventually reach the female flower.

So the correct option is 'epihydrophily'.

Transfer of pollen between two plants is 

botany pollination, fertilization and development of endosperm and embryo types of pollination cross pollination pollination and its types

  1. Cross pollination

  2. Self pollination

  3. Pollen transfer

  4. None of the above

Show answer
Correct Option: A
Explanation:

The transfer of pollen from an anther of a flower of one plant to a stigma of a flower of another plant of the same species by the action of wind, insects etc is known as cross pollination.