Question

Substances that undergo upward or downward transport

• A. Organic and mineral nutrients
• B. Water and minerals
• C. Minerals and plant growth regulators
• D. Hormones and Amino acids

Hint:

Bidirectional transport is a characteristic of phloem – especially for hormones, amino acids, and sugars.

Answer 1

The Correct Option is D

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.