Which Of The Following Is The Best Contrivances To Ensure Self-pollination?


During self-pollination, the pollen grains are not transmitted from one flower to another. As a result, there is less wastage of pollen. Also, self-pollinating plants do not depend on external carriers. They also cannot make changes in their characters and so the features of a species can be maintained with purity.

Which of the following is an example of self-pollination?

Examples of self-pollinating plants include wheat, barley, oats, rice, tomatoes, potatoes, apricots and peaches. Many plants that are capable of self-pollinating can also be cross pollinated.

What are the conditions required for self-pollination?

Presence of male and female organs in the same flower is known as bisexuality. The presence of bisexual flowers is a must for self pollination. All the self pollinated plants have hermaphrodite flowers.

What are the 3 types of pollination?


  • Zoophilous flowers– In this type of pollination, the pollinating agents are animals like human beings, bats, birds etc. …
  • Anemophilous flowers– These flowers are pollinated by the agency of wind. …
  • Entomophilic flowers– These flowers are pollinated by insects.

What are the disadvantages of self-pollination?

The 3 disadvantages of self-pollination are as follows:

  • May lead to the weakening of variety or the species due to continued self-pollination, thereby affecting the quality of offspring.
  • Defective or weaker characters of the variety or breed cannot be eliminated.

What are two types of pollination?

Pollination: Pollination is the process of transfer of pollen grains from anther to stigma. The two types of pollination found in flowering plants are: Self pollination: that occurs within the same plant. Cross-pollination: that occurs between two flowers of two different plants but of the same kind.

What are the 4 steps of pollination?

Let’s break the fertilization process down into four generalized steps.

  • Step 1: Pollination. In general, male gametes are contained in pollen, which is carried by wind, water, or wildlife (both insects and animals) to reach female gametes. …
  • Step 2: Germination. …
  • Step 3: Penetration of the Ovule. …
  • Step 4: Fertilization.

What is known as self-pollination?

: the transfer of pollen from the anther of a flower to the stigma of the same flower or sometimes to that of a genetically identical flower (as of the same plant or clone)

Why is pollination so important?

It is an essential ecological survival function. Without pollinators, the human race and all of earth’s terrestrial ecosystems would not survive. Of the 1,400 crop plants grown around the world, i.e., those that produce all of our food and plant-based industrial products, almost 80% require pollination by animals.

Are Allogamy and Geitonogamy same?

is that geitonogamy is (botany) transfer of pollen grains from the anther of a flower to the stigma of another flower of the same plant while allogamy is (biology) the fertilization of an ovum from one individual with the spermatozoa of another; cross-fertilization.

What is the most common method of pollination?

The most common method is cross-pollination where pollen is transferred between flowers on two different plants. Self-pollination takes place when pollination occurs within just one flower or between flowers on the same plant.

What is cleistogamy in pollination?

Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. … The more common opposite of cleistogamy, or “closed marriage”, is called chasmogamy, or “open marriage”.


Which process takes place after pollination?

Only after pollination, when pollen has landed on the stigma of a suitable flower of the same species, can a chain of events happen that ends in the making of seeds. A pollen grain on the stigma grows a tiny tube, all the way down the style to the ovary.

What pollination is in commelina?

In cleistogamy, the flowers are intersexual. They remain closed causing self pollination. It occurs late in the flowering season in some plants, e.g., Commelina, balsam, Oxalis, iola, etc.

What is types of pollination?

The two types of pollination

  • Self-pollination. In self-pollination, the pollen from the anther of a flower is transferred to the stigma of the same flower or the stigma of a different flower on the same plant. …
  • Cross-pollination. …
  • Pollination Activity.

What are the seven steps in pollination?

Terms in this set (7)

  • a bee seeks nectar from a flower.
  • while gathering nectar from the nectaries the bee brushes against the anthers.
  • pollen from the anthers stick to the bee’s hairy body.
  • the bee moves to another flower on another plant.

What is the first step in self-pollination?

Pollination is the movement of male pollen to the female part of the flower (stigma), the first step in successful seed and fruit production by the plant. Self-pollination is when pollen is transferred from the anther to the stigma within a single plant.

What is pollination explain with examples?

Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma. … Flowers are the tools that plants use to make their seeds. The basic parts of the flower are shown in the diagram below. Seeds can only be produced when pollen is transferred between flowers of the same species.

What is pollination Shaalaa?

Pollination is the transfer of pollen grains from the stamen to the stigma of the pistil. Pollination occurs when pollen grains are carried from the anther to the stigma by insects, birds, wind or water.

What is pollination with example?

Bees provide a good example of the mutualism that exists between hymenopterans and angiosperms. Flowers provide bees with nectar (an energy source) and pollen (a source of protein). When bees go from flower to flower collecting pollen they are also depositing pollen grains onto the flowers, thus pollinating them.

Is self pollination good or bad?

Self-pollination or ‘selfing’ can be bad for a plant resulting in inbreeding and less healthy offspring. This breakthrough could be used to breed stronger more resilient crops faster and at lower cost; a new approach in the quest for a secure and plentiful food supply.

What is difference between self and cross pollination?

Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species.

What is the disadvantage of cross pollination?

The disadvantage of cross pollination are:

Huge amounts of pollen grains are wasted. – There is a chance of genetic recombination which can lead to elimination of good qualities of the parent. Note: The other type of pollination is, self pollination.