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5 Questions

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Plant Biology: Water and Mineral Uptake

Created by

@NourishingCatharsis

Questions and Answers

What role do root hairs play in plants?

Structural support

Production of chlorophyll

Absorption of water and minerals (correct)

Photosynthesis

Why does water move from the soil into the root hairs?

Root hairs excrete excess water.

The water potential in the soil is lower than in the roots.

Water potential in the soil is higher than in the root hairs. (correct)

The cell sap in the root hairs has a higher concentration of solutes.

What is the relationship between solute concentration and water potential in root hairs compared to soil water?

Root hairs have no solutes.

Soil water has higher solute concentration.

Both have equal solute concentrations.

Root hairs have higher solute concentration. (correct)

Which statement best describes the function of the red arrow in the diagram?

<p>It illustrates the movement of water into the root hair.</p> Signup and view all the answers

What would happen if the water potential of the cell sap matched that of the soil water?

<p>Water would no longer move into the root hairs.</p> Signup and view all the answers

Study Notes

Uptake of Water and Mineral Salts by Roots

Root hairs increase the surface area for absorption of water and mineral salts into the plant.
Soil water typically has lower concentrations of dissolved substances (solutes) compared to the cell sap in root hairs.
Higher water potential in the soil drives the movement of water into the root hairs.
Water flows from areas of higher water potential (soil) to lower water potential (cell sap), facilitating absorption.
The process relies on osmotic pressure, where water moves to balance solute concentrations inside the root cells.

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Description

This quiz focuses on the uptake of water and mineral salts by root hairs in plants. Understand the processes involved in osmosis and the role of water potential in plant nutrition. Test your knowledge about how plants absorb essential nutrients from the soil.