What is the term for a nutrient that is scarce in the environment and consequently controls biological growth?

A. Limiting nutrient
B. Micronutrient
C. Delimiting nutrient
D. Macronutrient


Answer: A. Limiting nutrient

Environmental & Atmospheric Sciences

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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

Environmental & Atmospheric Sciences

How many half lives must elapse before 75% of parent isotope becomes daughter isotope?

a) One half life b) Two half lives c) Three half lives d) Four half lives e) Not enough information given to answer this question

Environmental & Atmospheric Sciences

There are two sets of standards that distinguish fair trade. These are fair trade labelling organizations International (FLO) and standards applied to workers on farms and in factories

Indicate whether the statement is true or false.

Environmental & Atmospheric Sciences

Native American people frequently set fire to the prairie in order to provide for hunting grounds and ease of travel.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences