W3 Feb S2 Revision Quiz - Plant Transport Systems

A plant had its roots cut off, and was subsequently placed in blue dye for 3 days, before being taken out for inspection. Which part will turn blue first?

• phloem vessels in the leaves

• phloem cells in the stem

• xylem vessels in the leaf

• xylem vessels in the stem

A ring of outer bark was removed from a tree, and the affected area was observed for the next few days. It was observed that there was swelling around the removed ring of bark, and the tree eventually shrivelled and died. 

 

What was the reason for the death of the tree?

• The tree did not receive enough water as the xylem vessels were cut.

• The tree did not receive enough food as the phloem vessels were cut.

• The tree did not receive enough water as the xylem vessels were cut.

• The tree did not receive enough food as the leaves had withered.

What characteristics of a root hair cell help it to absorb water?

• concentrated cell sap

• large central vacuole 

• long narrow protrusion

• all of the above

A plant cell Q undergoing plasmolysis was placed in sugar solution. What substance is in the gap T between the cell membrane and the cell wall?

• cell sap

• cytoplasm

• sugar solution

• water

Describe what happens when a plant cell is placed in 40% salt solution. Explain your answer. [3]