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9 grade science

The growth of a pollen tube towards ovule is caused by

  • A. Phototropism
  • B. Hydrotropism
  • C. Gravitropism
  • D. Chemotropism

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11 Months agoGrade
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1 Answer

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ApprovedApproved Tutor Answer11 Months ago

The growth of a pollen tube towards the ovule is primarily influenced by chemical signals. This process is known as chemotropism. The pollen tube detects specific chemicals released by the ovule, guiding its growth toward it.

Understanding the Options

  • Phototropism: Growth in response to light.
  • Hydrotropism: Growth towards moisture.
  • Gravitropism: Growth in response to gravity.
  • Chemotropism: Growth towards chemical stimuli.

In this case, the correct answer is D. Chemotropism.

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