Question

With reference to competitive exclusion, which one of the following became extinct when browsing goats were introduced in Galapagos islands?

• A. Abingdon tortoise
• B. Warblers
• C. Darwin's finches
• D. Cathamalus

Answer 1

The correct option is A Abingdon tortoise

Competition is struggling by the organisms for the same resources like food, shelter and sex. The competition is between two organisms belonging to the same species, this is called intraspecific competition. The competition between organisms belonging to different species is called interspecific competition. For example- in some shallow South American lakes visiting flamingoes and resident fishes compete for their common food, the zooplankton in the lake. Resources need not be limiting for competition to occur. For example- Abingdon tortoise in Galapagos Islands became extinct within a decade after goats were introduced on the island, apparently due to the greater browsing efficiency of the goats.

So, the correct answer is 'Abingdon tortoise'.