Multiple Choice
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
Correct Answer:
Verified
Q12: A community includes both living and nonliving
Q13: Science is a process of testing and
Q14: The interaction of a biotic community and
Q15: The correct sequence of the scientific method
Q16: There is generally only one valid explanation
Q18: _ is the scientific study of the
Q19: Ecological models can be mathematical or they
Q20: Which of the following best represents the
Q21: All populations of different species living and
Q22: A valid scientific hypothesis must be testable.