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a system formed by the interaction of a community of organisms with their physical environment
process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
an inherited trait that increases an organism's chance of survival and reproduction in a certain environment
the ability of one or more organisms to tolerated a particular chemical designed to kill it.
single celled; lack cell nuclei; reproduce by dividing in half; often found in harsh environments; e.g - methanogens
single celled; lack cell nuclei; reproduce by dividing half; incredibly common; e.g - blue-green algae
an organism whose cells have nuclei and cell walls.
absorb their food through body surface; have cell walls; most live on land
diverse group of one-celled organisms and their many celled relatives. They are often classified as plant-like, animal-like, and fungus-like. most live in water. Malaria is a protist
the solid part of the Earth that consists of all rock, and the soils and sediments on Earth's surface
Earth's outer layer that is cool and rigid and includes the crust and uppermost part of the mantle. It is made up of tectonic plates.
Sections of the Earth's lithosphere that rest on top and glide across the underlying asthenosphere
the layer of the atmosphere that lies between the troposphere and the mesosphere and in which temperature increases as altitude increases; contains the ozone layer
a form of oxygen that has three oxygen atoms in each molecule instead of two. protects us from dangerous ultraviolet radiation from the sun
the continuous process by which water moves from Earth's surface to the atmosphere and back
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