Question

match each species interaction to the correct example. each answer is used only once. the interaction between humans and their intestinal bacteria an eagle eating a fish two grazers, such as rabbits and deer, feeding on the same grass patch a bird nesting in a tree

Explanation:

• Mutualism: In the interaction between humans and their intestinal bacteria, both benefit. Bacteria get nutrients and a habitat, and humans get help with digestion, vitamin production, etc.
• Exploitation: An eagle eating a fish is a case of exploitation. The eagle (predator) benefits by getting food, and the fish (prey) is harmed.
• Competition: Two grazers (rabbits and deer) feeding on the same grass patch compete for the same resource (grass).
• Commensalism: A bird nesting in a tree. The bird benefits (gets a place to nest), and the tree is (usually) neither significantly helped nor harmed.

Answer:

• the interaction between humans and their intestinal bacteria: mutualism
• an eagle eating a fish: exploitation
• two grazers, such as rabbits and deer, feeding on the same grass patch: competition
• a bird nesting in a tree: commensalism