A Level Biology Practice Exam

What is a key feature of the relationship in symbiosis?

1. One organism exploits another

2. It leads to competition for survival

3. Both organisms derive benefits from the interaction

4. It is a temporary association

The correct answer is: Both organisms derive benefits from the interaction

In symbiosis, a key feature is the mutualistic relationship where both organisms involved derive benefits from their interaction. This can manifest in various forms, such as mutualism, commensalism, or parasitism, but at the heart of true symbiosis, especially in the case of mutualistic relationships, both parties gain from the association. For instance, in the relationship between pollinators (like bees) and flowering plants, the plants receive help with reproduction through pollination, while the bees obtain nectar as a food source. This interdependence highlights the mutually beneficial aspect of symbiosis and emphasizes how these interactions contribute to the health and survival of both species involved. In the context of other options, while exploitation or competition may occur in some ecological interactions, they do not characterize symbiotic relationships. Symbiosis generally implies a degree of coexistence and benefit rather than rivalry. Additionally, symbiotic relationships can often be long-lasting rather than temporary, further distinguishing them from fleeting associations.