Plant System Interactions

What is the primary function of the xylem in plants?

• Transporting water and minerals

• Transporting sugars and organic compounds

• Exchanging gases with the atmosphere

• Storing water and minerals

Which of the following describes phototropism?

• Growth of plants towards light

• Growth of plants in response to gravity

• Rapid movement of plant leaves

• Growth of plants in response to water

What role do guard cells play in plant systems?

• Control the size of stomata

• Transport water and nutrients

• Store chemical energy

• Produce sugars through photosynthesis

Which plant hormone is responsible for promoting the growth of plant cells and causing stems to bend?

• Auxins

• Gibberellins

• Cytokinins

• Ethylene

What is the main job of the roots in a plant's root system?

• Absorb water and nutrients

• Produce sugars through photosynthesis

• Transport sugars throughout the plant

• Exchange gases with the atmosphere