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Across
1.total number of characteristics of a specific species, subspecies or group of species
6.the capture of usable energy from the environment to produce organic compounds in which that energy is stored
7.the total amount of organic matter on Earth or in any ecosystem or area
9.community of plants and animals that have common characteristics for the environment they exist in
10.biogeographic region comprising of North America and Greenland
12.biogeographic region comprising of Central and South America
13.the use of biomass to release energy that can be used to do work
14.species that produce their own organic matter from energy source and inorganic compounds
16.suggested that the world could be divided into six biogeographic regions
17.explained diversity of life forms thru biological evolution
18.Those better able to survive and reproduce leave more offsprings
19.change in biomass over a given time
Down
2.the ratio of production of one trophic level to the production of the next trophic level
3.comparatively small habitat separated from a major habitat of some kind
4.refers to the change in inherited characteristics of a population from generation to generation
5.the ratio of energy output to input
6.refers to the variety of life forms in an area
8.living organisms classified into groups based on evolutionary similarities
11.a major zone of treeless level or rolling ground found in cold regions, mostly north of the Arctic Circle (Arctic tundra)
15.open grasslands, usually with scattered bushes or trees, characteristic of much of tropical Africa

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