(a(i))[1]
State the name of the organism in Fig. 8.1 that occurs in the greatest numbers in the pyramid of numbers.
(a(ii))[1]
State the name of the secondary consumer in Fig. 8.1.
(a(iii))[1]
State the principal source of energy input in a food chain.
(b(i))[1]
The pyramids of numbers in Fig. 8.1 and Fig. 8.2 have different shapes. Explain why they are different.
(b(ii))[4]
State and explain what effect this might have on the populations of frogs and insects.
(c)[1]
Put a tick (✓) in the box that describes bacteria and fungi.