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Read the given statements and select the correct option.
(i) Darwin and Darwin (1880) found that sensation of unilateral illumination was perceived by the coleoptile tip of canary grass.
(ii) IAA is universal natural auxin, discovered by Kogl et al.
(iii) IBA is both natural and synthetic auxin.
(iv) Auxins promote the growth of lateral shoots.
  • a)
    Statements (i) and (ii) are correct.
  • b)
    Statements (ii) and (iii) are correct.
  • c)
    Statements (i), (ii) and (iii) are correct.
  • d)
    Statements (i), (ii), (iii) and (iv) are correct.
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Read the given statements and select the correct option.(i) Darwin and...
Auxins promote the growth of apical buds and suppress the growth of lateral buds/lateral shoots.
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Read the given statements and select the correct option.(i) Darwin and...
Explanation of the Correct Answer
The correct answer is option 'C', as statements (i), (ii), and (iii) are accurate. Let's break down each statement:
Statement (i): Darwin and Darwin (1880)
- This statement is correct. Charles and Francis Darwin conducted experiments that demonstrated how unilateral light affects the growth of the coleoptile tip (the shoot of grass). They found that the tip is responsible for sensing light direction, which is crucial for phototropism.
Statement (ii): IAA as a Universal Natural Auxin
- This statement is also correct. Indole-3-acetic acid (IAA) is recognized as the primary naturally occurring auxin in plants. Kogl and his colleagues were instrumental in isolating and identifying IAA, highlighting its role in plant growth and development.
Statement (iii): IBA as Natural and Synthetic Auxin
- This statement is correct as well. Indole-3-butyric acid (IBA) is both a natural and a synthetic auxin, often used to promote root formation in cuttings. It plays a significant role in plant growth regulation.
Statement (iv): Auxins and Lateral Shoot Growth
- This statement is incorrect. Auxins primarily promote the growth of the main shoot (apical dominance) and inhibit the growth of lateral shoots rather than promoting it. This is known as apical dominance, where the main shoot suppresses the growth of lateral buds.
In summary, options (i), (ii), and (iii) are correct, while statement (iv) is misleading. Thus, option 'C' is the right choice.
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Read the given statements and select the correct option.(i) Darwin and Darwin (1880) found that sensation of unilateral illumination was perceived by the coleoptile tip of canary grass.(ii) IAA is universal natural auxin, discovered by Kogl et al.(iii) IBA is both natural and synthetic auxin.(iv) Auxins promote the growth of lateral shoots.a)Statements (i) and (ii) are correct.b)Statements (ii) and (iii) are correct.c)Statements (i), (ii) and (iii) are correct.d)Statements (i), (ii), (iii) and (iv) are correct.Correct answer is option 'C'. Can you explain this answer?
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Read the given statements and select the correct option.(i) Darwin and Darwin (1880) found that sensation of unilateral illumination was perceived by the coleoptile tip of canary grass.(ii) IAA is universal natural auxin, discovered by Kogl et al.(iii) IBA is both natural and synthetic auxin.(iv) Auxins promote the growth of lateral shoots.a)Statements (i) and (ii) are correct.b)Statements (ii) and (iii) are correct.c)Statements (i), (ii) and (iii) are correct.d)Statements (i), (ii), (iii) and (iv) are correct.Correct answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Read the given statements and select the correct option.(i) Darwin and Darwin (1880) found that sensation of unilateral illumination was perceived by the coleoptile tip of canary grass.(ii) IAA is universal natural auxin, discovered by Kogl et al.(iii) IBA is both natural and synthetic auxin.(iv) Auxins promote the growth of lateral shoots.a)Statements (i) and (ii) are correct.b)Statements (ii) and (iii) are correct.c)Statements (i), (ii) and (iii) are correct.d)Statements (i), (ii), (iii) and (iv) are correct.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the given statements and select the correct option.(i) Darwin and Darwin (1880) found that sensation of unilateral illumination was perceived by the coleoptile tip of canary grass.(ii) IAA is universal natural auxin, discovered by Kogl et al.(iii) IBA is both natural and synthetic auxin.(iv) Auxins promote the growth of lateral shoots.a)Statements (i) and (ii) are correct.b)Statements (ii) and (iii) are correct.c)Statements (i), (ii) and (iii) are correct.d)Statements (i), (ii), (iii) and (iv) are correct.Correct answer is option 'C'. Can you explain this answer?.
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