AP BIOLOGY

Detailed explanation-1: -Both the geosphere and hydrosphere provide the habitat for the biosphere, a global ecosystem that encompasses all the living things on Earth. The biosphere refers to the relatively small part of Earth’s environment in which living things can survive.

Detailed explanation-2: -The biosphere is made up of the parts of Earth where life exists-all ecosystems. The biosphere extends from the deepest root systems of trees, to the dark environments of ocean trenches, to lush rain forests, high mountaintops, and transition zones like this one, where ocean and terrestrial ecosystems meet.

Detailed explanation-3: -The biosphere supports all life on Earth, 3 to 30 million species of plants, animals, fungi, single-celled prokaryotes such as bacteria, and single-celled eukaryotes such as protozoans.

Detailed explanation-4: -The biosphere, also known as the ecosphere, is the Earth’s dynamic biological epidermis of unknown dimensions. It is the natural habitat of living organisms. It is made up of the lithosphere’s surface, a lower portion of the atmosphere, and the hydrosphere. The biosphere is the world’s ecological system as a whole.

Detailed explanation-5: -The four spheres are the geosphere (all the rock on Earth), hydrosphere (all the water on Earth), atmosphere (all the gases surrounding Earth), and biosphere (all the living things on Earth).