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Multiple Choice

Which of the following pairs are incorrectly matched?

a. Growth of roots towards the earth - Positive hydrotropism
b. Bending of roots towards water - Positive hydrotropism
c. Growth of pollen towards the ovule - Positive phototropism
d. Winding of tendrills towards the support - Negative thigmotropism

  1. Only a and b
  2. Only a and c
  3. Only b and c
  4. Only c and d
  5. Only b and d
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