Which substances are transported in the xylem?
Water
Water and mineral ions
Sugars and amino acids
What feature of palisade cells makes them efficient at photosynthesis?
They have a thick, waxy coating
They are packed with chloroplasts
They are very close to most of the stomata
In which direction are substances transported in the phloem?
Upwards only
Downwards only
Upwards and downwards
What is the process that transports substances in the phloem?
Transpiration
Translocation
Transcription
How is the rate of water uptake by a plant measured?
By the increase in mass of plant leaves
Counting the number of stomata on a leaf
Using a potometer
What type of cells release the energy required for phloem transport?
Companion cells
Sieve tubes
Vessels
How does water enter a root hair cell?
By osmosis
By active transport
By diffusion
Why would Christmas tree growers spray the trees with a chemical that blocks the trees' stomata?
To increase the rate of photosynthesis
To reduce the transpiration rate so they they lose less water
To make them look attractive for Christmas
What happens to the rate of transpiration when air movement is increased?
It stays the same
It increases
It decreases
Why does the rate of transpiration increase as the light intensity is increased?
The plant is respiring more so will require less carbon dioxide
The plant will need to get rid of excess water
The plant opens its stomata to allow the entry of carbon dioxide for photosynthesis