Biodiversity

Mutualism is a type of symbiotic relationship where both participating species derive a benefit from the interaction.

Gray wolves are a classic example of a keystone species because their presence regulates prey populations, which in turn affects vegetation and the entire ecosystem structure.

The Great Barrier Reef, located off the coast of Australia, is the world's largest coral reef system and the largest living structure on Earth.

The Antarctic Desert is the largest desert on Earth, as a desert is defined by low precipitation rather than temperature.

An ecologist is a scientist who studies the interactions between organisms and their physical environment.

A species is defined as a group of organisms that can interbreed and produce fertile offspring.

Commensalism is a symbiotic relationship where one organism benefits while the other is neither helped nor harmed. Option A describes parasitism, option B describes mutualism, and option D describes competition or predation.

Rainforests are characterized by high biodiversity compared to the harsh, arid conditions of deserts. Deserts have less precipitation and fewer water sources, making them less hospitable for a wide variety of life.

Mutualism is a relationship where both species benefit. The arctic bumblebee pollinates the arctic poppy, while the poppy provides nectar for the bee.

Biodiversity refers to the variety of all living organisms within a given area. Options A, C, and D are too narrow because they focus only on specific groups like plants or mammals.