IGCSE Biology (0970) — May–June 2024, Paper 41

Fig. 1.1 is a photograph of a fish. Fig. 1.2 is a photograph of an amphibian. State two visible features that distinguish the fish in Fig. 1.1 from the amphibian in Fig. 1.2.

Fig. 2.1 shows the internal body temperature of a human and the external environmental temperature during six hours in one day. The internal body temperature range is from 36.4 °C…

Fig. 3.1 shows a drawing of a root hair cell (with mitochondria) and Fig. 3.2 shows a drawing of a palisade cell (with chloroplasts and a mitochondrion). Explain the reasons for…

A student investigated the effect of lactase on three different liquids: milk, lactose-free milk and sucrose solution. The student used an indicator to test for glucose (brown in…

Fig. 5.1 is a graph showing the effect of temperature on the rate of transpiration from the upper and lower surfaces of a leaf provided with a constant supply of water (with…

Polio is a viral disease that can cause nerve damage in humans. In one area, polio vaccination began in 1957. Fig. 6.1 shows the number of cases of polio in this area between 1950…

Fig. 7.1 is a flowchart showing the stages of eutrophication. Complete Fig. 7.1. fertilisers enter a lake → the concentration of ............ increases → the growth of…