The Great Burdock plant’s seeds have spines on them that attach to the fur of animals that brush against it. The seed then travels with the animal until it eventually falls off, which spreads the plant’s seeds farther than the plant could have done. What type of symbiotic relationship is this?

The burdock plant benefits because its seeds hitch a ride and can spread farther. The animal is not described as benefiting or being harmed, so this is commensalism, the relationship in which one organism benefits while the other is unaffected.

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