Tag: agents of pollination

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

Animals assist with

  1. Pollination and seed dispersal

  2. Control of plant growth and response

  3. Translocation of organic nutrients

  4. Asexual propagation of plants
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pollination is when pollen grains from an anther, the male portion of a flower, are transferred to a female part in the flower, known as the stigma. Zoophily is a form of pollination whereby pollen is transferred by animals. Zoophilous species frequently evolve mechanisms to make themselves more appealing to the particular type of pollinator. Seed dispersal is the movement or transport of seeds away from the parent plant. Plant species transported externally by animals can have a variety of adaptations for dispersal, including adhesive mucus, and a variety of hooks, spines and barbs

So, the correct answer is 'pollination and seed dispersal'

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

Myrmecophily is characterised by 

  1. Plants harbouring ants

  2. Plants storing food underground

  3. Plants imitating the habit of animals

  4. Plants with small leaves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Myrmecophily is the symbiotic relationship between plant and ants in which plants provide food to plant or place to hide eggs and ants help them in pollination. 

So the correct option is 'Plants harbouring ants'

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

Pollination by insects is called

  1. Entomophily

  2. Chiropterophily

  3. Anemophily

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

Pollination by insects is entomophily. Insects are the most common biotic agents of pollination. Bees are the most common insect which acts as pollinating agents. Other insect pollinators are butterflies, flies, beetles, wasps, ants, moths. Flowers are brightly colored and scented to attract the insects. Majority of insect-pollinated flowers are large-sized. Entomophily occurs in Calotropis, Ficus, Salvia, etc.

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

Pollen grains have spiny exine to aid in

  1. Entomophily

  2. Anemophily

  3. Ornithophily

  4. Cheiropterophily
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
• Entomophily is the pollination of flowers by means of insects.
• Anemophily is the pollination of flowers by means of wind.
• Ornithophily is the pollination of flowers by means of birds.
• Chiropterophily is the pollination of flowers by means of bats.
The pollen grains which have spiny exine are related to Entomophily i.e. pollination by insects. Spines help in the attachment of the pollen to the body of pollinators. This, pollen grains have spiny exine to aid in Entomophily.
So, the correct answer is A.
Multiple choice biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

In entomophily, pollinating agents are

  1. Insects

  2. Bats

  3. Birds

  4. Ants
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In entomophily, insects are the pollinating agents. Insects are the most common biotic agents of pollination. Bees are the most common insect which acts as pollinating agents. Other insect pollinators are butterflies, flies, beetles, wasps, ants, moths. Majority of insect-pollinated flowers are large-sized. These flowers are scented, colorful and fragrant and contain nectaries to attract insects. 

Hence, option A is the correct answer.

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

  1. Nymphaea

  2. Nelumbo

  3. Eichhornia crassipes

  4. Vallisneria/ Zostera
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Hydrophily is pollination of flowers by means of water. Example Zostera. 
When pollination occurs by water in the plants floating on the surface of the water, it is called Ephydrophily. Example Vallisneria.
In Zostera, long needle-shaped pollens are produced which float in the water. The female flower produces long structure from the stylar stigmatic region which extends to the water surface and coils around the pollen grain and pulls it underwater and thus, pollination occurs.
In Vallisneria, the male flowers detach on maturity and float on the surface of the water while the female flowers grow under water and they come up to the surface with the help of their thin long stalk. As the stalk grows further, the flowers which were vertical become horizontal and thus, a cup-like depression is formed around the female flower. The male flowers which are floating on the surface of the water, fall into the cup and due to jerk, the anthers dehisce and pollens are transferred to the stigma and thus, pollination occurs on the surface of the water. 
Hence, hydrophily occurs in Vallisneria and Zostera.
So, the correct answer is D.
Multiple choice biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

Which pollinating agents is responsible to bring about $80\%$ of pollination?

  1. Insects

  2. Water

  3. Humans

  4. Wind
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • About 80 percent of all plant pollination is biotic i.e it is carried out by insects such as bees, wasps, and birds.
  • The remaining 20 percent of abiotically pollinated species, 98 percent is by wind pollination and 2 percent by water pollination.
Multiple choice biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

Spiny or sticky pollen grains and large, attractively coloured flowers are associated with

  1. Hydrophily

  2. Entomophily

  3. Ornithophily

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

Entomophily type of pollination takes place through the agency of insects. The entomophilous flowers are brightly colored and fragrance to attract the insects. Their pollen grains are sticky or spiny to easily get attached with the body of pollinators. When the insects visit the flowers, their body gets dusted with pollen grains, and when they fly and visit other flowers, they brush against the stigma which being sticky, at once receives the pollen grains from their body. Thus, cross-pollination is achieved. 

So, the correct answer is 'Entomophily'.

Multiple choice biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo
Thread-like pollen without exine are found in

  1. Hydrophily

  2. Entomophily

  3. Anemophily

  4. Chiropterophily
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Thread like pollen are found in Hydrophily where pollination occurs by means of water. Such pollen grains sometimes lack exine and form thread-like structures called the viscin threads. These structures aid the pollen to swim in water and thus, pollination can occur when they come in contact with a female flower.
So, the correct answer is A.
Multiple choice biology pollination and fertilization agents of pollination environmental conservation and biodiversity pollination, fertilization and development of endosperm and embryo

The hydrophilous flowers, pollinated completely under water, are known 

as ...............

  1. Epihydrogamous

  2. Hypohydrogamous

  3. Both (A) and (B)

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

Hypohydrogamy includes the plants which are pollinated inside the water, e.g., Ceratophyllum, Naja, etc. Epihydrogamous - includes the plants which are pollinated on the surface of water.