Transport in plants IGCSE

Front

What process allows mineral ions to move from the soil into the roots of plants?

Back

Active transport is the process that allows mineral ions to move from the soil into the roots against the concentration gradient.

Front

Which part of the plant loses more water?

Back

The lower surface of the leaf loses more water due to the presence of stomata.

Front

In which part of the plant does the movement of substances occur in one direction?

Back

Movement of substances is one way in the xylem.

Front

What is the role of cohesion in water movement in plants?

Back

Cohesion refers to the attraction between water molecules, which helps in the continuous upward movement of water in the xylem.

Front

What substances does phloem transport?

Back

Phloem carries sucrose and amino acids.

Front

Define osmosis in the context of plant transport.

Back

Osmosis is the movement of water molecules from an area of lower solute concentration to an area of higher solute concentration through a semi-permeable membrane.

Front

What is transpiration in plants?

Back

Transpiration is the process of water vapor loss from the aerial parts of the plant, primarily through stomata.

Front

Explain the difference between xylem and phloem.

Back

Xylem transports water and minerals from the roots to the rest of the plant, while phloem transports organic nutrients, particularly sucrose, from the leaves to other parts.

Front

What is the significance of stomata in plants?

Back

Stomata are small openings on the surface of leaves that allow for gas exchange and transpiration.

Front

How does temperature affect transpiration rates in plants?

Back

Higher temperatures increase the rate of transpiration as they cause water to evaporate more quickly from the leaf surface.