Q. Which of the following is a symbiotic relationship between the two living species in which one organism is benefitted at the expense of the other?
Answer: Parasitism
Notes: Parasitism is a type of symbiotic relationship between the two living species in which one organism is benefitted at the expense of the other. For example, bacteria or viruses often rely on a third organism, known as the carrier, or vector, to transmit them to the host.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 107 in 1. Introduction to Environment & Ecology in above course in App.