Biology 2015 JAMB Past Questions - Question 26: The highest level of ecological organization is the

Correct Answer

C

Explanation

A niche of an organism e.g. lizard is the physical s p a c e (territory) occupied by the organism and the role or part the organism plays in the area or habitat. Population is a group of organisms of the same species that are capable of interbreeding, found in a place at a given time (e.g. lizards). Ecosystem is afunctional unit in nature which is composed of plants and animals that interactwith one another and with- the abiotic components (non living factors of the environment) resulting in a self sustaining system. Thus ecosystem is composed of a habitat big or small, producers, consumers, d e c o m p o s e rs , chemical and physical factors. Biosphere is the atmosphere (air) water or hydrosphere lithosphere (land) where life can be found. It is the largest and highest level of biological organization and is composed of thousands of ecosystems