The biological diversity encountered increases as one moves from the poles to the tropics. Within a particular latitude, diversity also varies:
A) between different continents
B) between different habitats
C) as a function of temperature and precipitation
D) as a function of topographic complexity
E) all of the above
Ans: E) all of the above
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Which type of leukocyte is involved in killing eukaryotic parasites?
a. monocytes b. neutrophils c. eosinophils d. lymphocytes e. basophils
Volcanoes release carbon dioxide into the air during an eruption in what form?
a. carbon dioxide b. carbon monoxide c. methane d. ethane
The systems that coordinate communication are
A. skeletal and muscular. B. circulatory and respiratory. C. nervous and endocrine. D. digestive and circulatory. E. urinary and immune.
Using OLS to solve for the slope and intercept of a simple linear regression will yield a regression line that satisfies which of the following conditions?
A. 
= 0
B.
= 
C. Sum of squared residuals equals 0
D. None of the answers is correct.