Which of the following encourages the movement of water over gills?
a. beating cilia
b. a fish swimming with its mouth closed
c. the diaphragm contracting
d. a muscular tail contracting
Ans: a. beating cilia
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In some organisms, a normal stop codon, UGA, encodes for the amino acid
A) leucine. B) arginine. C) isoleucine. D) selenocysteine. E) cysteine.
How do protostomes differ from deuterostomes?
a. Protostomes are diploblastic. b. Protostomes have radial symmetry. c. Protostomes undergo spiral cleavage during development. d. The first opening that develops in protostomes is the anus. e. Protostomes undergo indeterminate cleavage during development
If species C lives in contaminated water and acquires a low concentration mercury in its tissues, which species will be most affected by the mercury?
A) All species will be impacted equally. B) species B C) species C D) species D E) species E
Suppose you have a random sample of 2179 credit scores from a population of mortgage applicants with a sample mean of 620 and known population standard deviation of 70, and would like to calculate the 99% confidence interval of the population mean credit score. Which of the following would be the correct construction?
A. 620 ± 2.58 
B. 2179 ± 1.96 
C. 620 ± 1.65 
D. 620 ± 2.58 