1.The diagram shows a root hair absorbing ions from the surrounding soil

What will assist the uptake of ions by the root hair?

2.The graph shows the amount of oxygen produced by a green plant during a 24-hour period.Which letter represents midnight?

3.An experiment is set up as shown.Flasks 1 and 2 contain lime water. Air is pumped through the flasks

What is the appearance of limewater in flasks 1 and 2 after a period of ten minutes?

4.Where and how does carbon dioxide enter a plant?

5.What is produced as a result of digestion by a protease?

6.For which food test must the sample be dissolved in ethanol?

7.A farmer sprays some fields with nitrogen fertilizers. Soon afterwards, the fertilizer is washed off by heavy rain into a nearby lake. Then, a few weeks later, most of the organisms in the water die.The list includes the main stages of this process.

P Light is blocked from deeper water plants.

Q Plants cannot photosynthesise and die.

R Algae multiply rapidly on the lake surface.

S Oxygen levels fall and aerobic organisms die.

T Aerobic bacteria feed on dead plants.

In what order do these stages occur?

8. The diagram shows a villus.

After a meal containing starch and oil, which substances are absorbed mainly into vessel X and which substances are absorbed mainly into vessel Y?

9.The diagram shows the structure of a leaf.

Which letter identifies a cell, a tissue and an organ?