ORGANISATION - Plant Organ Systems

Question 1

Transpiration

Answer 1

The loss of water from the leaves

Question 2

Effect Of Temperature On Transpiration

Answer 2

Increase in temperature will increase the rate as more energy is transferred to the water to allow it to evaporate

Question 3

Effect Of Humidity On Transpiration

Answer 3

Increase in humidity will decrease the rate as the air contains more water vapour so the concentration gradient for diffusion is lower

Question 4

Effect Of Air Movement On Transpiration

Answer 4

Faster air flow will increase the rate as it will blow away water vapour allowing more to evaporate

Question 5

Effect Of Light Intensity On Transpiration

Answer 5

Increased light intensity will increase the rate as it will cause stomata to open

Question 6

What Is The Role Of The Stomata And Guard Cells

Answer 6

Are to control gas exchange and water loss

Question 7

What Does The Stomata Do?

Answer 7

At night stomata is closed due to no photosynthesis taking place in the dark so stomata closes. When water is plentiful guards cells take up water and bend. This causes stomata to open so gases for photosynthesis are free to move in and out of stomata along with water from transpiration.

Question 8

Translocation

Answer 8

Movement of food through phloem tissue. Phloem tissue transports dissolved sugars from leaves to the rest of the plant