The sum total of all the roles an organism plays in a habitat is referred to as its? by Sunday | Apr 27 | Biology NECO | 0 comments A. ecology B. ecosystem C. habit D. habitat E. niche Correct Answer: Option E – niche Users Also Read These:The activities of an organism which affect the…The number of individuals in a habitat in relation…The sum total of adaptive changes from pre-existing…Special modification which enables an organism to…An organism that habours another organism is referred to as?