1.1. There are three levels of organisation in an ecosystem.

Which order shows the levels of organisation from lowest to highest?

☐ A Community, population, organism

☐ B Community, organism, population

☐ C Organism, community, population

☐ D Organism, population, community

1.2. Figure 1 shows food webs for two gardens.

Figure 1

Slug pellets are put on the soil around the lettuce plants in garden A and garden B.

Slug pellets kill slugs.

(i) A scientist predicts that the number of caterpillars will decrease in garden A.

Give one reason why the number of caterpillars will decrease in garden A.

(1)

(ii) The scientist predicts that the number of caterpillars will increase in garden B.

Give one reason why the number of caterpillars will increase in garden B.

(1)

(iii) Figure 2 shows the population of slugs in garden A for five years.

Slug pellets were used during the first year

Figure 2

Describe the trend in the slug population from year 1 to year 5.

(2)

1.3. (i) Flatworms from New Zealand that eat slugs are now living in the UK.

Which term describes a species from one country that is living in another country?

(1)

☐ A Pathogenic

☐ B Non-pathogenic 

☐ C Indigenous

☐ D Non-indigenous

(ii) Figure 3 shows tiny white animals called mites on the skin of a slug.

The mites feed on blood.

Figure 3

Explain why these mites are classed as parasites.

(2)