Consider the following statements concerning food chains. I. Removal of 80% tigers from an area resulted in greatly increased growth of vegetation. II. In a grassland ecosystem with deers being primary consumers, removal of most of the carnivores resulted in an increased population of deers. III. The length of food chains is generally limited to 3 to 4 trophic levels due to energy loss. IV. The length of food chains

Step-by-step solution

The series of organisms eating one and being eaten by other is called food chain. A simple food chain consists of producers, herbivores and carnivores. The length of food chain is generally limited to 3-4 trophic levels due to energy loss. In grazing food chain, the producers (i.e., plants) are eaten by herbivores (i.e., rabbit, dear, cow, etc) and are eaten by carnivores. Therefore, the removal of most of the carnivores resulted in an increased population of deers.