(a(i))[1]
State the source of energy for the organisms at trophic level 1 in Fig. 1.1.
(a(ii))[2]
Calculate the percentage of energy transferred from trophic level 2 to trophic level 3 in Fig. 1.1. Give your answer to one significant figure.
(a(iii))[2]
State two reasons for the reduction in energy between trophic levels 1 and 4, as shown in Fig. 1.1.
(a(iv))[2]
Describe the advantages of using a pyramid of energy instead of a pyramid of biomass to represent food chains.
(b(i))[1]
Complete the sentence to define population. A population is a group of organisms of one species living in the same [BLANK] at the same [BLANK].
(b(ii))[5]
Describe and explain why the graph has the form shown at X in Fig. 1.2.