(a(i))[1]
State which organism is the producer in this food chain.
(a(ii))[2]
Define the meaning of the term producer.
(a(iii))[1]
State which organism is the secondary consumer in this food chain.
(a(iv))[1]
State which organism is the herbivore in this food chain.
(a(v))[1]
State what the arrows in a food chain show.
(b)[3]
Explain how removing too many crabs could affect the other organisms in the food chain shown in Fig. 3.1.