In some shallow American lakes, unrelated visiting Flamingoes and resident fishes compete for the common food which is:

1.	Crustaceans	2.	Zooplankton
3.	Cichlid fishes	4.	Prawns

A process in which the fitness of one species is significantly lower in the presence of another species, is termed as :

Abingdon tortoise in Galapagos islands became extinct within a decade after goats were introduced on the island due to:
1. Habitat fragmentation
2. Better browsing efficiency of goats
3. Predator of goat attacking tortoise
4. Virus of goats parasitizing tortoise

The ‘Competitive Exclusion Principle’ was given by:

A species whose distribution is restricted to a small geographical area because of the presence of a competitively superior species, is found to expand its distributional range dramatically when the competing species is experimentally removed. This is called:

“Competitive Exclusion Principle” may be true if:

One mechanism that promotes co-existence rather than exclusion amongst competing species is:

Cuckoos laying their eggs in the nests of crow is an example of:

An orchid growing as an epiphyte on a mango branch is an example of:

All the following relations are examples of commensalism except: