Question

question 25 of 35
mutualism commensalism facilitation
answer bank
gut - dwelling microbes that aid in hosts digestion ants that live on acacia trees and protect it from small herbivores
plants produce spiny seeds that stick to the fur of passing animals species of feather louse hitchhikes on flies to transmit to new hosts
nitrogen fixing plants that enrich nutrient poor soil beaver dam turns a stream into a large pond

Explanation:

Mutualism is a symbiotic relationship where both species benefit. Gut - dwelling microbes that aid in host's digestion and ants that live on acacia trees and protect it from small herbivores are examples as both partners gain. Commensalism is a relationship where one species benefits and the other is neither helped nor harmed. Plants producing spiny seeds that stick to the fur of passing animals and a species of feather louse hitchhiking on flies to transmit to new hosts are examples. Facilitation is when one organism makes the environment more suitable for another. Nitrogen - fixing plants that enrich nutrient - poor soil and a beaver dam turning a stream into a large pond are examples.

Answer:

Mutualism: gut - dwelling microbes that aid in host's digestion, ants that live on acacia trees and protect it from small herbivores
Commensalism: plants produce spiny seeds that stick to the fur of passing animals, species of feather louse hitchhikes on flies to transmit to new hosts
Facilitation: nitrogen fixing plants that enrich nutrient poor soil, beaver dam turns a stream into a large pond