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Extra Credit Crossword (Ch. 6, 7, 10)

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Across
1
Biome that has deeper layers of soil called permafrost, and are frozen throughout the year
6
An increase in the amount of nutrients
7
Species that are not native to a particular region
11
The most threatened areas of high species diversity
12
Biome with the greatest amount of species diversity
17
Area of water located near the shore, aquatic life is diverse and abundant
18
This treaty was the first effective effort to stop the slaughter of African Elephants (poaching for ivory)
19
Refers to the weather conditions such as temperature, precipitation, humidity, and winds that occur in an area over a long period of time
20
Any form of genetic material, such as that contained within the reproductive, or germ cells of animals and plants
Down
2
Free-swimming organisms, such as fish and whales
3
Refers to all the different genes contained within all members of a population
4
Lowest layer of the tropical rainforest that receives the least amount of sunlight
5
Species that are native to and found only in one region
8
Species that are critical to the functioning of an ecosystem
9
Refers to the number of different species in a given area
10
A large region characterized by a specific type of climate and certain types of plants and animal communities
13
Distance north or south of the equator, measured in degrees
14
An area in which fresh water from a river mixes with salt water from the ocean
15
The height of an object above sea level (hint: think of a mountain)
16
Illegal hunting