CIE iGCSE Co-Ordinated Science B18.2 Food chains and food webs Exam Style Questions Paper 4
Question
(a) Fig. 10.1 shows part of a food web from a desert ecosystem.
(i) Use Fig. 10.1 to construct a food chain that contains a quaternary consumer.
(ii) State the maximum number of trophic levels in the food web in Fig. 10.1.
(iii) Identify an organism that occupies trophic level 1 in Fig. 10.1.
(b) Selective breeding of falcons for racing is done in some countries.
(i) Complete the sentences to describe selective breeding of falcons for racing.
Falcons are observed and selected for their …………………………… .
These falcons breed together.
This passes on their alleles to their ………………………… .
This process is ……………………… over many generations.
(ii) Explain why the changes to the population as a result of selective breeding are not an example of adaptation.
▶️Answer/Explanation
Ans :
10(a)(i) cactus →kangaroo rat →spider →snake →falcon ;;
10(a)(ii) 5 ;
10(a)(iii) cactus ;
10(b)(i) speed / desirable features ;
offspring ;
repeated ;
10(b)(ii) changes are not caused by natural selection ;
population is not more suited to its environment / no change in adaptive features ;