February/March 2026 Paper 42

2026 · 6 questions · 36 parts · 80 marks

0/80 marks

0Correct0Partial0Wrong36Unattempted

Filters0 active

Questions

Select a part to jump to its question

Finish set

1(a)(i)1(a)(ii)1(b)(i)1(b)(ii)1(c)(i)1(c)(ii)1(d)(i)1(d)(ii)1(d)(iii)1(d)(iv)

–/18 mks

2(a)(i)2(a)(ii)2(a)(iii)2(b)(i)2(b)(ii)2(c)

–/17 mks

3(a)(i)3(a)(ii)3(a)(iii)3(b)(i)3(b)(ii)

–/13 mks

4(a)(i)4(a)(ii)4(a)(iii)4(b)(i)4(b)(ii)

–/11 mks

5(a)(i)5(a)(ii)5(a)(iii)5(a)(iv)5(b)

–/10 mks

6(a)(i)6(a)(ii)6(a)(iii)6(a)(iv)6(a)(v)

–/11 mks

6(a)(i)Energy Flow Nutrient CyclesMedium3 marks

Figure 6.1 shows a food web from a lake ecosystem.

Figure 6.1, a lake food web: hornwort to loach; phytoplankton to daphnia and copepod; daphnia to loach and shrimp; copepod to shrimp; shrimp to newt and rainbow trout; loach and newt to rainbow trout; rainbow trout to bald eagle

Use Figure 6.1 to identify:

all of the producers

an organism that only feeds as a secondary consumer

an organism that consumes at three different trophic levels

6(a)(ii)Energy Flow Nutrient CyclesEasy2 marks

Use Figure 6.1 to construct a food chain containing six trophic levels.

Answer

0 words

6(a)(iii)Characteristics Variety OrganismsEasy1 mark

The newt is an amphibian. State one feature of vertebrates only found in amphibians.

6(a)(iv)Species InteractionsMedium2 marks

Humans harvest rainbow trout for food. Use Figure 6.1 to explain the possible effect of humans harvesting rainbow trout on the population of bald eagles.

Answer

0 words

6(a)(v)Energy Flow Nutrient CyclesMedium3 marks

Explain why it is more energy efficient for humans to eat crop plants than it is for humans to eat rainbow trout.

Answer

0 words