Tag: pollination, fertilization and development of endosperm and embryo

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

Multiple choice biology pollination and fertilization agents of pollination environmental conservation and biodiversity 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.

  1. Anemophily

  2. Entomophily

  3. Hydrophily

  4. Zoophily
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In hydrophily (pollination by water), pollen grains are often protected by a mucilaginous covering to prevent wetting and have a specific gravity that allows them to float or remain submerged at the level of the stigma.

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

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

  1. a, d and e

  2. b and e

  3. b and d

  4. b, c, d

  5. a, b and d
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Zostera is a marine seagrass and Vallisneria is a freshwater plant, both of which are pollinated by water. Water Hyacinth and Amorphophallus are pollinated by insects.

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

Insects visit flowers to help in pollination.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Which one is applicable to insect pollinated flowers?

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

The insect Blastophaga grossorum is associated with the pollination of

  1. Mango

  2. Ficus

  3. Paddy

  4. Nelumbium
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

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

  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)
Reveal answer Fill a bubble to check yourself
C Correct answer
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'

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

Which of the following is pollinated by water?

  1. Viola

  2. Yucca

  3. Oxalis

  4. Commelina

  5. Zostera
Reveal answer Fill a bubble to check yourself
E Correct answer
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'.

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

Vallisneria spiralis is a classical example of

  1. Epihydrophily

  2. Hypohydrophily

  3. Anemophily

  4. Chiropterophily
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Transfer of pollen between two plants is 

  1. Cross pollination

  2. Self pollination

  3. Pollen transfer

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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.