An ecologist conducts a greenhouse experiment to study the effect of nitrogen concentration on the productivity of sunflower seedlings.What is the independent variable in this experiment?
A) productivity of sunflowers
B) concentration of nitrogen
C) the number of sunflower seeds planted
D) the daily amount of water given to each sunflower seed
Correct Answer:
Verified
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A)are parts of
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Q20: A predator consuming prey would occur at
Q21: Q22: Science can best be described as Q24: An integrated set of hypotheses that together Q25: A model is used by ecologists to
A)a search
A)prove
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