(a)[2]
Define population.
(b(i))[1]
State one producer in this food web.
(b(ii))[1]
State one herbivore in this food web.
(b(iii))[1]
Complete the four-organism food chain that finishes with the seagull. Write the organism names in the boxes.
(b(iv))[4]
Explain what effect this might have on the populations of starfish and limpets.
(b(v))[2]
Suggest two factors that could cause the shark population to fall.
(c)[1]
State the main source of energy for food webs.
(d)[4]
State the names of the processes represented by the letters A, B, C and D in Fig. 2.2.