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Question
Entry of pollen tube into the embryo sac is under ________ guidance.
Entry of pollen tube into the embryo sac is under ________ guidance.
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Solution
The correct option is A chemotropic
Chemotropism is defined as the growth of organisms guided by stimulus of chemicals from outside of the organism. Entry of pollen tube into embryo sac is under the guidance of chemotropism. In case of pollen grain, when it falls on stigmatic surface, compatibility protein is formed which involves chemical influence. This results in the formation and further growth of pollen tube into the stigma, style, ovary ehich will eventually help in fertilization.
Chemotropism is defined as the growth of organisms guided by stimulus of chemicals from outside of the organism. Entry of pollen tube into embryo sac is under the guidance of chemotropism. In case of pollen grain, when it falls on stigmatic surface, compatibility protein is formed which involves chemical influence. This results in the formation and further growth of pollen tube into the stigma, style, ovary ehich will eventually help in fertilization.
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