Question

Identify the substances being transported in each case

1. Soil ⇢ root hair ⇢ xylem
2. Soil ^energy⇢ root hair ⇢ xylem
3. Leaf ⇢ phloem⇢ roots

Answer 1

1. Soil ⇢ root hair ⇢ xylem

• Water is transported from soil to xylem through root hairs.
• It does not require any energy.

2. Soil ^energy⇢ root hair ⇢ xylem

• Minerals are also transported from soil to xylem through root hairs.
• It requires energy as the concentration of minerals is high in the plant cell as compared to the groundwater.

3. Leaf ⇢ phloem⇢ roots

• Food is translocated from leaves to roots through phloem tissue.
• It is in both the directions upward as well as downward.