Which characteristic of a geographic region
would have the greatest influence on the type of
ecosystem that forms in that region?
(1) ratio of autotrophs to heterotrophs
(2) concentration of atmospheric oxygen
(3) number of food chains
(4) climatic conditions

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the answer is b. glad to .

the correct answer is sex-linked recessive.

i just took the test