Ecotourism ________
A) increases biodiversity by providing income to areas that might otherwise be destroyed
B) decreases biodiversity by causing increased speciation in environmentally sensitive areas
C) is a reasonable option only in impoverished countries
D) decreases biodiversity by selling souvenir organisms
E) increases biodiversity by introducing new, rare species
A
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A species' niche within a community describes
A. the species it competes with in the community. B. its position in a food chain or food web. C. the total set of biotic and abiotic resources it uses within the community. D. how it evolved in response to interspecific competition.
Amino acids are molecules which contain both an amino group and a carboxyl group. Which atomic species must be present in all amino acids?
A) C and H B) C, H and N C) C, H and O D) C, H, N and O
The Canadian Shield is one of the most ________-rich areas on the Earth's surface
A) Mineral B) Fish C) Lumber D) Fur
All of the following statements about deposition are true EXCEPT
a. Deposition is a natural process. b. Deposition helps form rich and productive soils. c. Deposition tends to remove topsoil, the most valuable soil layer for living things. d. All of the above are true statements about deposition.