IGCSE Biology Paper-3: Specimen Questions with Answers 290 - 290 of 358

Question 290

Write in Short

Short Answer▾

5.1 desert food web.

Types of Animals

(i) Use Fig. 5.1 to complete a food chain that has four different organisms and ends with the fox.

Write the names of three missing organisms in the boxes.

Different Organisms

(ii) State the names of two top carnivores in the food web in Fig. 5.1.

Explanation

(i)

Food Web Refers

Food web refers to a group of inter- related food chains in a particular community. Under natural conditions, the linear arrangement of food chain hardly occurs & these remain indeed inter-connected with each other through different types of organisms at different trophic level. Simple food chains are very rare in nature. This is because each organism may obtain food from more than one tropic level. In other words, one organism forms food for more than one organism of the higher trophic level. Food webs are very important in maintaining equilibrium (homeostasis) of ecosystem.

Fox and Hawk

Other top carnivores hailed from five different families and included animals such as wolves, wild dogs, dingo, tigers, lions, cheetahs, jaguars, pumas, Eurasian lynx, sea otters, leopards, bears and hyenas.