Shigellosis may not be acquired through oral-fecal routes and direct contact.
a. true
b. false
Ans: b. false
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Magnetoreceptors ____
a. are well characterized and understood b. are known to rely on the mineral magnetite c. help many types of animals navigate long distances d. have been studied only in homing pigeons e. have been studied primarily in moths
The primary building block (monomer) of proteins is
A. an amino acid. B. a nucleotide. C. a fatty acid. D. a glucose molecule. E. a group of four interconnected rings.
Why is the analysis of transcriptomes useful for genetics research?
A) It can reveal many aspects of gene regulation. B) It is easy to do without computer programs. C) It can help discover nontranscribed DNA regions. D) It directly identifies transcription factor binding sites.
Which of the following statements apply to freshwater fish?
A) They lose water by osmosis.
B) The concentration of solutes in their internal fluids is lower than in the surrounding water.
C) They pump out ions via the gills.
D) They produce dilute urine.