Understanding Xylem and Phloem

What is the primary function of xylem in plants?

• To store food and nutrients

• To provide structural support

• The primary function of xylem in plants is to transport water and minerals.

• To facilitate photosynthesis

Describe the structure of xylem tissue.

• Xylem tissue is primarily made up of chloroplasts and stomata.

• Xylem tissue is composed of tracheids, vessel elements, parenchyma cells, and fibers, organized to facilitate water and mineral transport.

• Xylem tissue consists of only parenchyma cells and no other types.

• Xylem tissue is responsible for photosynthesis and gas exchange.

What role does phloem play in plant transport?

• Phloem transports minerals from the leaves to the roots.

• Phloem transports organic nutrients, primarily sugars, throughout the plant.

• Phloem stores nutrients in the roots.

• Phloem absorbs water from the soil.

How do xylem and phloem differ in terms of direction of transport?

• Xylem transports downwards; phloem transports upwards.

• Xylem and phloem both transport in one direction only.

• Xylem transports in multiple directions; phloem transports downwards.

• Xylem transports upwards; phloem transports in multiple directions.

What are the main components of phloem?

• Stomata

• Root hairs

• Sieve elements, companion cells, phloem fibers, phloem parenchyma

• Xylem vessels

Explain how water is transported through xylem.

• Water is transported through xylem by diffusion only.

• Water is absorbed by leaves and then moves to roots.

• Water is transported through xylem via capillary action, root pressure, and transpiration pull.

• Water moves through xylem due to gravity alone.

What is the significance of companion cells in phloem?

• Companion cells transport oxygen to the roots.

• Companion cells store water for the plant.

• Companion cells are responsible for photosynthesis in phloem.

• Companion cells assist in the transport of nutrients in phloem by supporting sieve tube elements.

How does the structure of xylem facilitate its function?

• The structure of xylem consists of short, wide cells for rapid transport.

• The structure of xylem, with its lignified walls and elongated cells, facilitates efficient water transport and provides structural support.

• Xylem is mainly responsible for gas exchange in plants.

• Xylem primarily transports nutrients and sugars.

What is the process of transpiration in plants?

• Transpiration is the absorption of water by plant roots.

• Transpiration is the release of water vapor from plant leaves through stomata.

• Transpiration is the movement of nutrients through plant stems.

• Transpiration is the process of photosynthesis in plants.

Describe the differences in cell types found in xylem and phloem.

• Xylem contains tracheids and vessel elements for water transport; phloem contains sieve tube elements and companion cells for nutrient transport.

• Xylem contains only parenchyma cells; phloem contains only tracheids.

• Xylem transports nutrients; phloem transports water.

• Xylem has sieve tube elements; phloem has vessel elements.