Soil layers with distinct properties are called ________
A) profiles B) horizons C) tiers D) bands
B
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You are an aquatic biologist studying a small lake. The stream that drains into this lake runs by croplands. You are detecting a pesticide called atrazine in the insects and worms that live in the lake
The predatory birds such as herons and egrets have very high concentrations of atrazine in their blood. The birds prey on the frogs and small fish. What process explains the high atrazine level in the birds? a. antagonistic interaction b. Persistence c. chronic effect d. biological magnification e. none of these answers
Nearly all beach sand is quartz. Indicate whether the statement is true or false
Rogue waves are best described as ____
A) the highest waves of a tsunami B) a breaking internal wave C) a strong rocking motion within a harbor D) a single massive wave that develops in the open ocean
Hydrocarbon emissions are produced mainly by cement manufacturing industries.
Answer the following statement true (T) or false (F)