[12] Transport in flowering plants

What role does phloem have in the transport of sucrose and amino acids

transports sucrose and amino acids from the leaves, produced from photosynthesis, to growing tissues and storage organs in the plant

What role does xylem have in the transport of water and providing structure

transports water from the roots to the rest of the plant. They also have strong walls, which give the root the strength to resist forces that might pull the root out of the ground

How is water absorbed by root hair cells?

via osmosis, as the contents of the root hair cell is less water than the soil water

What is transpiration

the process by which water is absorbed by plant roots, travelling through the plant, and evaporation from the leaves, mainly through the stomata.

What 4 factors effect transpiration?

1) the greater the wind speed the more quickly transpired water moves away from the leaf, and the greater the rate of transpiration

2) the higher temperature, the greater the rate of water evaporation and transpiration from the leaf

3) the lower the air humidity, the greater the diffusion gradient between the leaf and the outside air and the rate of diffusion

4) light intensity - water passes out of the leaf through the stomata when they are open. stomata are open during the day when it is light but closed in the night when it is dark

How can the environmental factors affecting rate of transpiration be investigated

you would set up the potometer with a leafy plant and measure its initial mass. The plant is placed in water, and the rate of water uptake is monitored by recording the decrease in mass over time. By changing environmental factors such as light intensity, temperature, humidity, or air movement, you can observe how these factors affect the rate of transpiration by measuring the change in mass, as higher transpiration rates will cause more water loss.

explain how are mineral ions taken up from the soil?

by active transport which requires energy to move the ions from an area of lower concentration in the soil to an area of higher concentration in the root cells, allowing the plant to absorb minerals