Which of the following is an example of chemotropism in plants?
Show answer & explanation
Correct answer: C
Explanation
Correct Answer:
Pollen tube growing towards ovule
Explanation:
Chemotropism is the directional growth movement of plants in response to chemical stimuli. A classic example of this is the growth of the pollen tube, which grows downward toward the ovule guided by chemical substances secreted by the stigma. In contrast, the shooting bending toward light is phototropism, roots growing downwards is geotropism, and leaves folding upon touch is a seismonastic movement.
Additional Points:
These directional growth movements in plants play a crucial role in their survival and reproduction. Chemical signaling ensures that the pollen tube accurately navigates toward the ovule to accomplish successful fertilization.
Important Questions and Answers:
Question: The growth of the pollen tube towards the ovule is an example of which type of movement?
Answer: Chemotropism.
Question: The folding of touch-me-not plant leaves upon being touched is an example of which movement?
Answer: Seismonasty or Thigmonasty.