IB Biology 9.2 Transport in Phloem Quiz

What is the movement of organic molecules in plants called?

• Photosynthesis

• Translocation

• Respiration

• Transpiration

What are the organic molecules dissolved in water in plants referred to as?

• Xylem sap

• Phloem sap

• Chlorophyll

• Starch

In plants, where is the 'source' area typically located?

• Roots

• Leaves

• Stems

• Flowers

What type of process is involved in the 'loading' from the source to the sink in plants?

• Passive process

• Active process

• Diffusion

• Osmosis

What is the purpose of phloem sieve tubes?

• Phloem sieve tubes transport water and minerals.

• Phloem sieve tubes are involved in the transport of sugars.

• Phloem loading occurs in the xylem.

• Phloem sieve tubes are responsible for photosynthesis.

What is the role of phloem in translocation?

• Transport of water and solutes along hydrostatic pressure gradients

• Transport of oxygen and carbon dioxide

• Storage of nutrients

• Photosynthesis

Why does water flow from the source to the sink in phloem?

• Due to gravitational pull

• Due to active unloading of sucrose and osmosis

• Due to magnetic fields

• Due to temperature differences

What is the function of sieve plates in phloem?

• To store nutrients

• To facilitate the flow of phloem sap

• To conduct photosynthesis

• To absorb water

What happens when an aphid's stylet is severed?

• The aphid dies immediately

• Phloem sap continues to flow out

• The plant stops growing

• The plant becomes toxic