Quiz on Plant Transport Systems

What is the primary force driving water through the xylem?

• Osmosis

• Bulk flow

• Transpiration

• Root pressure

Which part of the plant is referred to as the 'source'?

• Roots

• Leaves

• Flowers

• Fruits

What is the main function of phloem?

• Transport water

• Transport organic solutes

• Support plant structure

• Store nutrients

Which process involves the loss of water vapor from plant leaves?

• Transpiration

• Photosynthesis

• Respiration

• Guttation

What is root pressure primarily caused by?

• Transpiration pull

• High humidity in the atmosphere

• Low water potential in leaves

• High osmotic pressure in roots

Which of the following is NOT a characteristic of xylem vessels?

• Narrow diameter

• Hollow tubular cells

• Living cells at maturity

• Lignified cell walls

What is the role of companion cells in phloem?

• Support xylem structure

• Transport water

• Store nutrients

• Assist in the transport of sugars

Which mechanism is responsible for the upward movement of water in plants?

• Diffusion

• Cohesion and adhesion

• Pressure flow model

• Active transport

What happens to stomata during the night?

• They increase in number

• They close

• They open

• They become inactive

Which of the following factors does NOT affect the rate of transpiration?

• Temperature

• Humidity

• Air movement

• Soil pH