Question:
Substances that undergo upward or downward transport
Substances that undergo upward or downward transport
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Bidirectional transport is a characteristic of phloem – especially for hormones, amino acids, and sugars.
Updated On: Mar 19, 2026
- Organic and mineral nutrients
- Water and minerals
- Minerals and plant growth regulators
- Hormones and Amino acids
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The Correct Option is D
Solution and Explanation
Hormones and amino acids can move both upward and downward through the phloem depending on the plant's needs, unlike water and minerals which primarily move upward.
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