In vertebrates, what are cranial nerves responsible for controlling? Select all correct choices
A. eye movement
B. facial expression
C. speech
D. feeding
A,B,C,D
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Based on molecular evidence, fungi were present on land at least ____ years ago
a. 1 billion b. 500 million c. 250 million d. 125 million e. 10 million
Receptors for polar molecules are found ____ while receptors for nonpolar molecules are located
____.
a. on the cell surface; within the cell b. within the cell; on the cell surface c. on the cell surface; on the nuclear membrane d. on the nuclear membrane; on the cell surface e. on the cell surface; within the membrane interior
What purpose do restriction enzymes play in bacterial cells?
a. Restriction enzymes prevent the overproduction of mRNA in the bacterial cell. b. Restriction enzymes attack bacteriophage DNA when it enters the cell. c. Restriction enzymes promote bonding of the RNA polymerase to the promoter. d. Restriction enzymes limit the rate of bacterial replication. e. Restriction enzymes connect Okazaki fragments.
Suppose you had a random sample of 50 observations with a sample mean of 10 and sample standard deviation of 5. Suppose another observation is observed that has a value of 10. How will the sample mean change from the original sample?
A. It will increase. B. It will decrease. C. It will not change. D. Cannot be determined by the information given.