Measures of the central tendencies of variables such as the mean, median, and mode are examples of:
A. covariance.
B. descriptive statistics.
C. causal relationships
D. data mining.
Answer: B
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These biological compounds are non-polar and insoluble in water:
A. proteins B. nucleic acids C. lipids D. carbohydrates
Robert Koch contributed to the field of microbiology by being the first person to
A) develop the tuberculin test. B) formulate four postulates for definitively linking a specific microorganism to a specific disease. C) use agar as a solidifying agent in growth media. D) develop the tuberculin test, formulate four postulates for definitively linking a specific microorganism to a specific disease, and use agar as a solidifying agent in growth media.
The main energy for prolonged muscle work comes from:
a. stored ATP b. stored creatine phosphate c. fermentation of carbohydrates d. aerobic respiration of carbohydrates and fats e. stored ADP
The reason that this insect can ‘skate’ across the water in a pond is _____
1.its legs make covalent bonds with the water
2.cohesion of the water molecules keeps it from sinking
3.the pH of the water is lower than the pH of the insect’s legs
4.salt in the pond buffers the water so the insect does not sink
