The endosperm produced during double
fertilization is
a. diploid.
b. tetraploid.
c. polyploid.
d. triploid.
e. haploid.
D
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Most of the organic sulfur is located in
A. fatty acids and lipids. B. monosaccharides and carbohydrates. C. amino acids and proteins. D. nucleotides and nucleic acids.
As a result of _____, an old animal usually has more pollutants in its body than a young one
a. bioaccumulation b. biological magnification
Suppose you have a random sample of 2,179 credit scores from a population of mortgage applicants with a sample mean of 620 and sample standard deviation of 70, and would like to calculate the t-stat for the null hypothesis that the population mean is 610. Which of the following is the correct construction of the t-stat?
A. 
B. 
C. 
D. 
Many microbes use pyruvate carboxylase or phosphoenolpyruvate carboxylase ________.
A. to synthesize oxaloacetate B. to synthesize acetyl-CoA C. to synthesize amino acids D. to synthesize glucose