Plant Transpiration and Water Uptake Quiz

What is the primary function of transpiration in plants?

• To absorb sunlight

• To draw water molecules against gravity up the xylem vessels

• To produce glucose

• To release oxygen

Which process converts water within the spongy mesophyll into vapor?

• Photosynthesis

• Condensation

• Evaporation

• Precipitation

What role do guard cells play in transpiration?

• They absorb nutrients

• They occlude stomatal pores to regulate water vapor loss

• They transport glucose

• They produce chlorophyll

How do root cells create a hypertonic environment for water uptake?

• By absorbing sunlight

• By expelling H+ ions and displacing mineral ions

• By releasing oxygen

• By producing glucose

What is the function of aquaporins in root cells?

• To transport glucose

• To optimize water uptake

• To release oxygen

• To produce chlorophyll

What is the primary force that draws water up the stem in plants?

• Gravity

• Tension force

• Magnetic force

• Electrical force

What characteristic of water allows it to associate with the xylem wall?

• Magnetic

• Adhesive

• Radioactive

• Elastic

What type of cells line the xylem vessels?

• Living cells

• Dead cells

• Nerve cells

• Muscle cells

Which hormone is released by dehydrated mesophyll cells to trigger the efflux of potassium from guard cells?

• Insulin

• Abscisic acid

• Adrenaline

• Melatonin

Which factor does NOT influence the rate of transpiration?

• Temperature

• Sunlight

• Soil type

• Humidity