Distribution Of Organisms 3.2

Question 1

‘The animals present in a sample of leaf litter
Were counted.

Animals | Number in sample
ground beetles | 10
woodlice | 35
slugs | 5
centipedes | 10
others | 10

What is the percentage of woodlice in the sample?

A. 35%
B. 50%
C. 65%
D. 70%

Answer 1

B. 50%

Question 2

An investigation was carried out into the effect of a hedge on the growth of wheat plants.

Groups of 100 wheat plants were planted at different distances from the hedge. The heights of the plants were measured after six weeks.

The reliability of the results was increased by:
A. measuring the height of plants after six weeks
B. planting groups of 100 wheat plants
C. planting the wheat plants at different distances from the hedge
D. Calculating an average height of wheat plants.

Answer 2

B. planting groups of 100 wheat plants