Tag: pollination and fertilization

Questions Related to pollination and fertilization

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

Show answer
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'.

Pollen grains do not germinate on the stigma of the same flower. The phenomenon is

botany pollination and fertilization types of pollination cross pollination pollination and its types

  1. Prepotency

  2. Self sterility

  3. Dicliny

  4. Dichogamy

Show answer
Correct Option: B
Explanation:
When a pistil having functional female gametes fails to set seeds with viable and fertile pollen, which can bring about fertilisation in another pistil, the pistil and pollen are said to be incompatible and this is known as incompatibility. 
When the sexual incompatibility is between individuals of different species, it is interspecific.
When the sexual incompatibility is between individuals of same species, it is intraspecific. This intraspecific incompatibility is also called as self-incompatibility which may include many reasons like pollen fail to germinate on the surface of the stigma of the same flower, which is also known as self-sterility.
So, the correct answer is B.

Two species live in the same locale but each one reproduces at the different time of the year & both do not attempt to mate each other. This can be considered as an example of

botany pollination and fertilization types of pollination cross pollination pollination and its types

  1. Gamete isolation

  2. Mechanical isolation

  3. Behavioral isolation

  4. Hybrid sterility

Show answer
Correct Option: C
Explanation:

The species of birds and animals shows different types of isolation. The organisms which are located in the same habitat or geographical area but do not mate with each other. This type of isolation is known as the behavioral isolation in which different species have a different type of behavior with respect to reproduction. This prevents the interbreeding of the different species. 

Thus, the correct answer is option C. 

Name the phenomenon of two flowers, one having long stamens and short styles, and other having short stamens and long style

botany pollination and fertilization types of pollination cross pollination pollination and its types

  1. Allogamous device

  2. Heterostyly

  3. Dicliny

  4. Herkogamy

Show answer
Correct Option: B
Explanation:
Heterostyly is the presence of 2 or 3 types of flowers within the same plant and such flowers differ in the length of style and stamens. Example, Primula which shows distyly.
It has two types of flowers:
1. Pin eyed flowers: These have long styles with short stamens.
2. Thrum eyed flowers: These have a short style and long stamens.
So, the correct answer is B.

Find out correct statement:-

botany pollination and fertilization types of pollination cross pollination pollination and its types

  1. Clonal selection is applicable to cross pollinated crops

  2. Inbreeding depression is loss of vigour due to inbreeding

  3. Dr. M.s swaminathan is responsible for revolution in india.

  4. plant tissue culture technique is not based on totipotency

Show answer
Correct Option: A

Cross-pollination is preferred over self-pollination because it?

botany pollination and fertilization types of pollination cross pollination pollination and its types

  1. Produces better offspring

  2. Forms new varieties

  3. Induces parthenogenesis

  4. Is economical

Show answer
Correct Option: B
Explanation:
  • Cross-pollination can be defined as the transfer of pollen grains from the male reproductive organ (an anther or a male cone) of one plant to the female reproductive organ (a stigma or a female cone) of another plant. 
  • Insects and wind act as the agents of cross-pollination.
  • Cross-pollination helps to produce varieties in species by recombinant genes while self-pollination maintains homozygosity. 
  • So the correct option is 'forms new varieties'. 

The get cross-pollinated by a species of bees, the Mediterranean orchid Ophrys employs

botany pollination and fertilization types of pollination cross pollination pollination and its types

  1. Psuedocopulation

  2. Sexual deceit

  3. Camouflage

  4. Diapause

Show answer
Correct Option: B
Explanation:

Mediterranean orchid Ophrys employs sexual deceit to ensure the cross pollination. In this process, one of the petals of the flower shows high resemblance with the structure of female bee. The male bee is deceived when it lands on the flower and tries to copulate with the petal. The male bee in the process of attempting pseudocopulation, carries pollen grains from one flower to the another.

Hence, the correct answer is 'Sexual deceit'.