Final answer:
A 1:1 mutualism is a symbiotic relationship where both species benefit equally. An example is the relationship between a plant and its pollinator, such as a bee. This type of mutualism can be found in both tropical and temperate forests.
Step-by-step explanation:
A 1:1 mutualism is a type of symbiotic relationship where both species involved benefit equally. An example of a 1:1 mutualism is the relationship between a plant and its pollinator, such as a bee. Bees collect pollen from flowers for food, and in the process, they transfer pollen from one flower to another, aiding in the plant's reproduction. The plant benefits from this pollination process, while the bee benefits from the nectar it obtains from the flowers. This close 1:1 mutualism can be found in both tropical and temperate forests, but it is generally more common in tropical forests due to the higher diversity of plant and pollinator species.