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Question
Growth of pollen tube towards embryo sac is
Growth of pollen tube towards embryo sac is
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Solution
The correct option is C Chemotropic
In angiosperms and some gymnosperms, the male gametes are transported to the embryo sac to complete the process of fertilisation. When a pollen grain lands on a stigma, the pollen tube continues to go down the pistil till it reaches the embryo sac. Its growth is chemotropic (grows toward a source of chemicals) likely toward calcium, boron, and/or auxin. The ovule is the source of the chemical. Thus, the correct answer is option C.
In angiosperms and some gymnosperms, the male gametes are transported to the embryo sac to complete the process of fertilisation. When a pollen grain lands on a stigma, the pollen tube continues to go down the pistil till it reaches the embryo sac. Its growth is chemotropic (grows toward a source of chemicals) likely toward calcium, boron, and/or auxin. The ovule is the source of the chemical. Thus, the correct answer is option C.
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