gas exchange and plant transport

lignin is a

• carbohydrate

• protein

• waxy material

• DNA

Which of the following are adaptions of root hairs for absorption

• Very numerous increasing surface area

• Green all over

• thin walls

• Not covered by a cuticle

How does the absorption of water into the root hairs take place

• Diffusion

• Active transport

• Osmosis

• Soaking

Which of the following (more than one) cause the movement of water from the roots to the upper parts of the plants

• Root pressure

• Ground tissue

• Transpiration

• Evaporation

What is the structure of the leaf labeled A in the diagram

• Stomata

• Guard Cells

• Upper epidemies

• Palisade layer

Which of the following leaf structures prevent a leaf from losing wafer through transpiration

• Tall stems

• Waxy Cuticle

• Stomata on lower surface

• Guard cells

• Green colour

Which of the following environmental conditions can cause the stomata to close during the day because the rate of transpiration is too great

• Humid Weather

• If plant loses too much water

• high temperatures

• high wind

• high level of carbon dioxide

What is the fate of most of the oxygen produced by photosynthesis

• evaporates

• Diffuses out through the stomata

• stored in the leaf

Which of the following is true for the fate of Glucose produced by photosynthesis

• Used in respiration to make energy

• Evaporated from the leaf

• Leaves through the stomata

What is cohesion?

• water molecules attracted to water molecules

• Water molecules attracted to lignin in plant cell walls

• Water molecules attracted to root hairs