Tag: pollination, fertilization and development of endosperm and embryo

Quizzes (7) Questions (199)

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

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

  • Hydrophily is the pollination by means of water. In Vallisneria, the male flower is detached from the plant and float on the surface of the water and is bought in the contact of the stigma of the female flower. 

So, option B is correct.

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

Insect pollinated flowers usually possess

  1. Sticky pollens with rough surface

  2. Large quantities of pollens

  3. Brightly coloured pollens

  4. Dry pollens with smooth surface
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Insect-pollinated flowers usually possess sticky and heavy pollens with a rough surface that allow them to stick to insects easily. Flowers also have sweet nectar that attracts insects that go from flower to flower to pollinate the flowers. The pollen grains are also in small quantities, because it is very likely that insects will enter another flower, and the pollen grains would have a higher chance of landing on the stigma. That's why there is no need of pollen grains in large quantities. 



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

Entomophily is pollination by

  1. Water

  2. Animals

  3. Air

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

  • Pollination is the transfer of pollen from the male anther to the female stigma. It is carried out with the help of animals, birds, insects, water, wind, etc. 
  • The pollination carried out by insects is called entomophily. 
  • Pollination carried out by water is called hydrophily. Pollination carried out by the wind is called anemophily.
  •  Pollination carried out by the animals is called zoophily. 

So, the correct answer is option D.

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. Very large in size
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Insect-pollinated flowers have large, bright, scented and colourful petals so that insects would be attracted to the flower. 
  • Also, they have nectar near the receptacle on the interior of the flower. So, the insects will enter the flower and can aid in pollination where the pollen grains from the anther in the flower gets scraped onto the insect to be transferred to the stigma of another flower. This form of pollination is known as Entomophily

So, the correct answer is 'Large, coloured and scented'
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.