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    growth of pollen tube towards ovule is an example of

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    Question

    The growth of pollen tube toward the ovule is an example of 

    A

    Phototropism

    B

    Hydrotropism

    C

    Thigmotropism

    D

    Chemotropism

    Medium Open in App

    Updated on : 2022-09-05

    Solution Verified by Toppr

    Correct option is D)

    Tropic moments can be defined as the growth moments in plants which the direction of the external stimulus(light, heat, chemical, etc) is a factor.

    Chemotropism is a type of tropic movement in which the growth or movement of a plant or plant part in response to a chemical stimulus.

    The growth of the pollen tube towards the ovule occurs in response to the presence of sugars in the style. Hence it is an example for chemotropism.

    So, the correct answer is 'Chemotropism'.

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    स्रोत : www.toppr.com

    The growth of pollen tubes towards ovules is due to chemotropism.

    The growth of pollen tubes towards ovules is due to chemotropism.

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    The growth of pollen tubes towards ovules is due to chemotropism.

    Question

    The growth of pollen tubes towards ovules is due to chemotropism.

    A True B False Open in App Solution

    The correct option is A True

    Chemotropism:

    Chemotropism is the growth of organisms such as bacteria and plants, with the help of a chemical stimulus from outside of the organism or from the organism's part.

    The response of the organism is termed 'positive' if the growth is towards the stimulus or 'negative' if the growth is away from the stimulus.

    Fertilization of flowers by pollen is achieved because the ovary release chemicals that produce a positive chemotropic response from the developing pollen tube.

    The growth of pollen tubes towards the ovule is an example of chemotropism.

    Hence, the given statement is true.

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    SIMILAR QUESTIONS

    Q. The growth of a pollen tube towards the ovule caused by a sugary substance as stimulus is an example of :

    (a) phototropism (b) chlorotropism (c) gravitropism (d) chemotropism

    Q. Question 18

    The growth of pollen tubes towards ovules is due to

    (a) hydrotropism (b) chemotropism (c) geotropism (d) phototropism

    Q. The growth of pollen tubes towards ovules is due toQ. Chemotropic movement of pollen tubes towards the micropylar end of the ovules in many cases has been attributed to the presence of.Q. Growth of pollen tube towards the ovule is due to:

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    स्रोत : byjus.com

    The growth of pollen tubes towards ovules is due to

    The growth of a pollen tube towards ovule is induced by a chemical (sugar) substance secreted by the ripened stigma of flower into the style towards ovary. It is an example of chemotropism, pollen grain responds to stimulus by growing a polen tube in downward direction, towards ovule for fertilisation.

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    The growth of pollen tubes towards ovules is due to

    Updated On: 27-06-2022

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    Text Solution Open Answer in App A hydrotropism B chemotropism C geotropism D phototropism Answer

    The correct Answer is B

    Solution

    The growth of a pollen tube towards ovule is induced by a chemical (sugar) substance secreted by the ripened stigma of flower into the style towards ovary.

    It is an example of chemotropism, pollen grain responds to stimulus by growing a polen tube in downward direction, towards ovule for fertilisation.

    Answer

    Step by step video & image solution for [object Object] by Biology experts to help you in doubts & scoring excellent marks in Class 10 exams.

    Question Details till 24/11/2022

    Question

    The growth of pollen tubes towards ovules is due to

    Chapter Name Control And CoordinationSubject Biology (more Questions)Class 10thType of Answer Video & ImageQuestion Language

    In Video - English In Text - English

    Students Watched 5.3 K +Students Liked 0 +Question Video Duration 1m46s

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