Card Set Information
What branch of science studies the origin, structure, and function of living things?
Anything that has or once had all the characteristics of life.
Process that results in mass being added to an organism; may include formation of new cells and new structures
Group of organisms that can interbreed and produce fertile offspring
Relatively thin layer of Earth and its atmosphere that supports life.
Any living factor in an organism's environment.
Biological community and all the nonliving.
An organism that produces its own food supply. They also
supply others with food energy.
An organism that cannot make its own food.
A heterotroph that decomposes organic material and returns the nutrients to soil, air, and water, making the nutrients available to other organisms.
Each step in food chain or food web.
Simplified model that shows a single path for energy flow through an ecosystem.
Model that shows many interconnected food chains and pathways in which energy and matter flow through an ecosystem.
Total mass of living matter at each trophic level.
Anything that takes up space and has mass
Chemical substance that living organisms obtain from the enviornment to carry out life processes and sustain life
Process in which nitrogen gas is captured and converted into a form plants can use.
Process in which fixed nitrogen compounds are converted back into nitrogen gas and returned to the atmosphere
Distance of a point on Earth's surface north or south of the equator.
Treeles biome with permantently frozen soil under the surface and average yearly precipitation of 15 - 25 cm.
Biome south of the tundra with dense evergreen forests and long, cold, dry winters.
Biome characterized by small trees and mixed shrub communties
Biome characterized by grasses and scattered trees, and herd animals such as zebras and antelopes.
Material deposited by water, wind, or glaciers.
Area of a lake or pond closest to the shore