Pollination
Pollination
Pollination The transfer of pollen grains from the anther to the stigma is known as pollination. When the anthers grow and mature; they burst open and release pollen grains (male gametes). These pollen grains are then carried to the stigma (female part) of another flower (of the same type) by insects, birds, wind or water. Insects and birds visit flowers to collect nectar and they are called as pollinators. While collecting nectar from a flower, some pollen grains stick to their wings and legs and get transferred to the flower on which they sit. This transfer of pollen grains from one flower to another of the same kind is called pollination. The process of pollination can occur in two ways:
Cross-pollination: The transfer of pollen grains from the anther of one flower to the stigma of another flower of another plant of the same type is known as cross-pollination. Cross-pollination can be observed in plants of maize, coconut, grasses, etc.
Self-pollination: The transfer of pollen grains from the anther to the stigma of the same flower or to the stigma of another flower on the same plant, it is termed as self-pollination. It can be seen in pea, rice, wheat, etc.
Agents Of Pollination: - wind, water and insects.
Wind: Wind blows away pollen grains from the anthers of one flower to the stigma of another flower. Pollen grains are very light. E.g. wheat, rice and maize.
Water: Water pollinated flowers release their pollen grains into the water and slowly carried to other flowers by water currents. E.g. sea grass.
Insects: Some pollen stick to the body parts of the insect .when these insects visit another flower, the pollen grains fall on the stigma .e.g. sweet pea, orchids and jasmine.
Which of the following are correct ? (a) The transfer of pollen grains from the anther to the stigma is known as pollination. When the anthers grow and mature; they burst open and release pollen grains (male gametes). (b) The pollen grains are carried to the stigma (female part) of another flower (of the same type) by insects, birds, wind or water. (c) Insects and birds visit flowers to collect nectar and they are called as pollinators. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct ? (a) The transfer of pollen grains from the anthers of a flower to the stigma of the same or another flower is known as pollination. (b) Cross-pollination is the transfer of pollen from the anthers of a flower to the stigma of a flower on another plant of the same species. (c) Wind-pollinated flowers produce light pollen grains which can be carried by the wind. This type of pollination is seen in plants like maple tree, grasses, dandelion etc. | |||
| Right Option : D | |||
| View Explanation | |||
Which one is not the medium of dispersal and pollination? | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [20]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
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10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
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Yogansh Nyasi
7thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
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Shivam Rana
7thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
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8thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
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7thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
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10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
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7thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
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8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
