After reviewing the graph below, one could state that:
A. grain yield of strain 1 is less dependent
than strain 2 on the nitrogen enrichment of
the soil.
B. at a nitrogen enrichment of 40 kg/hectare,
strain 2 provides a higher yield of grain.
C. nitrogen enrichment has little effect on
grain yield of strain 2.
D. strain 1 is the superior choice for grain
yield.
E. no interaction effect is observed between
nitrogen enrichment and grain yield for either
strain.
A
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The molecules that recruit cadherins to the sites of junction formation are called
a. catenins. b. plectins. c. nectins. d. vinculins.
The choice of whether a particular organism belongs to the experimental group or the control group should be based on ___________.
A. age B. size C. chance D. history E. gender
Which of the following is a good example of two phenomena that are correlated but show no causal relationship?
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A cell is placed in a solution that is hypotonic to the cell. Which of the following best describes movement of water in this situation?
a. Water will only flow into the cell. b. Water will only flow out of the cell. c. Water will flow into and out of the cell, but the overall net movement will be out of the cell. d. Water will flow into and out of the cell, but the overall net movement will be into the cell.