Tag: pollination and fertilization

Quizzes (6) Questions (136)

Questions Related to pollination and fertilization

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

Lever mechanism for pollination is characteristic feature of

  1. Ficus

  2. Salvia

  3. Ocimum

  4. Ranunculus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pollination mechanism in Salvia is a unique lever type. The flowers in this genus are arranged in thyrsus inflorescence and they are attractive and well adapted for cross-pollination through the agency of insects. In this lever mechanism of pollination, the Corolla has a spreading upper lip, which acts as a landing place for the insect. When the insects land on the lower lip of the corolla and in its endeavour to obtain nectar that is secreted by the hypogynous disc, pushes the sterile lobes of the stamen inwards. Due to this the upper half of the connective with the fertile lobes act as a lever. Then the anther lobe comes down and shed the pollen on the back of the insect.

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
Blastophaga grossorum is a wasp that specifically pollinates Ficus species. They exhibit a co-evolutional relationship existing for millions of years now. Blastophaga locates the ficus plant using its olfactory senses. This is an example of fig-wasp mutualism.
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

In Salvia, the pollination is affected by

  1. Water

  2. Air

  3. Animals

  4. Insects
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • The pollination mechanism in Salvia is a unique lever type. The flowers in this genus are arranged in thyrsus inflorescence and they are attractive and well adapted for cross-pollination through the agency of insects. 
  • In this lever mechanism of pollination, the Corolla has a spreading upper lip, which acts as a landing place for the insect. When the insects land on the lower lip of the corolla and in its endeavor to obtain nectar that is secreted by the hypogynous disc, pushes the sterile lobes of the stamen inwards.
  •  Due to this the upper half of the connective with the fertile lobes acts as a lever. Then the anther lobe comes down and shed the pollen on the back of the insect.

 So, option D is correct.

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

Flowers, which are pollinated by insects, are

  1. Colourless

  2. Small in size

  3. Large, coloured and scented

  4. Sticky
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Insects visit flowers that are open during the day. They are large, brightly coloured and have a strong scent. They have a tubular shape and a nectar guide. A nectar guide is regions on petals that are visible only to bees. This portion guides the bees to the centre of the flower helping in pollination. Thus the correct answer is option C.
Multiple choice biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

Lever mechanism for pollination is characteristic feature of 

  1. Ficus

  2. Salvia

  3. Ocimum

  4. Ranunculus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lever mechanism for pollination is characteristic feature of Salvia. The flowers in this genus are arranged in thysrus inflorescence and they are attractive and well adapted for cross pollination through the agency of insects. In this mechanism of pollination, the corolla has a spreading upper lip, which acts as a landing place for the insect. When the insects land on the lower lip of the corolla and in its endeavour to obtain nectar that is secreted by the hypogynous disc, pushes the sterile lobes of the stamen inwards. Due to this the upper half of the connective with the fertile lobes act as a lever. Then the anther lobe comes down and shed the pollen on the back of the insect.

So, the correct answer is option B.

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

In Ficus religiosa (peepal), the pollination is affected by

  1. Water

  2. Insects

  3. Birds

  4. Air
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Blastophaga quadriceps, the legitimate pollinator of Ficus religiosa, possesses two thoracic pockets in which pollen is stored for subsequent introduction into the young figs.  
  • Pocket loading takes place in the nearly ripe fig at the male phase. Impregnated female wasps leave the fig via narrow channels bored by the males. 
  • Upon entering young receptive figs, the female wasps begin oviposition, during which pocket emptying and pollination takes place.
Multiple choice biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

Hydrophily is best demonstrated by  

  1. Nelumbium

  2. Vallisneria

  3. Nymphaea

  4. Ranunculus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pollination by means of water is called as Hydrophily. In Vallisneria, the male flower is detached from the plant and it will float on the water and are bought in the contact of the stigma of the female flower.

So the correct option is 'Vallisneria.'

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

Assertion : Insects visit flowers the gather honey.

Reason : Attraction of flowers prevents the insects from damaging other parts of the plant.

  1. Both assertion and reason are true and reason is a correct explanation of the assertion.

  2. Both assertion and reason are true but reason is not a correct explanation of the assertion.

  3. Assertion is true but Reason is false

  4. Both Assertion and Reason are false

  5. Assertion is false but Reason is true
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Insect visit flowers to get nectar. The attraction of flower in plants is not to diverge the insect from damaging other part, but to bring about pollination (i.e., transfer of pollen to the stigma).

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

The flower is important to a plant because it helps in

  1. Attracting

  2. Production of nectar

  3. Pollination

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All the flowers are important to plant as they attract pollinators by producing nectar, attracting pollinators and helps to plants in the reproduction process by pollination.

So, the correct option is 'All of the above.'

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 structure/arrangement favours entamophily the most?

  1. Pollen grains with wings and feathery stigma

  2. Colourful petals and nectar secretion

  3. A bunch of flowers with less pollen

  4. Pollen grains with mucous covering
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pollination through insect is called as entamophily in which insect is attracted by nectar secreted by flower and colorful petals.

So the correct option is 'Colourful petals and nectar secretion.'