Topic 4 End Of Unit Assessment

In a plant cell, which structure contains vesicles?

The Golgi apparatus

Comment in the anti microbial properties of these four plant extracts

•All 4 inhibit the growth of bacteria

•P is the least effective

•no significant difference between Q,R and S due to overlap of ranges

Explain the role of a placebo in producing valid conclusions

Provides a control group for comparison, ensuring that the drug is causing the effects

Comment on the effects of deficiencies in magnesium and calcium ions on the growth of these rice plants.

B is lacking in magnesium ions. C is lacking calcium ions

•Effect of magnesium deficiency is shown earlier than the effect of calcium

•Because the first leaf to die is leaf 5 from group B plant

•Plants continue to grow in solution lacking in magnesium

•Plants stop growing in solution lacking in calcium

•Without calcium for the middle lamella new leaves cannot fully grow