(a)[3]
Explain why plants form the beginning of most food webs.
(b(i))[1]
Use Fig. 6.1 to finish a food chain with four different organisms that ends with the hawk. Fill the boxes with the names of the three missing organisms.
(b(ii))[2]
State two tertiary consumers in the food web in Fig. 6.1.
(c)[4]
Explain what effect this would have on the scorpion population and on the desert plant population if the number of locusts suddenly decreases.