Which plant is consumed by more people worldwide than any other crop?
a. wheat
b. corn
c. rice
d. potatoes
e. legumes
ANSWER: c
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In addition to visual comparison, which of the following would be the best way to determine that S. niagarae and S. yellowstonensis are separate species?
a. Look for the presence of chloroplasts b. By the presence of a silica shell c. By their location in different lakes d. Compare their DNA sequences e. Carbon date them
What is the term for manipulating the molecular basis of inheritance via recombinant DNA technology?
A) Restriction fragment length polymorphism (RFLP) B) Biotechnology C) Mendelian genetics D) Polymerase chain reaction (PCR) E) DNA fingerprinting
Gram-positive cultures older than 24 hours may stain Gram negative due to changes in the peptidoglycan layer.
A) True B) False
Hantavirus can be diagnosed by detection of
a. exposure to the virus. b. strength of immune response. c. presence of viral genome. d. all of the above.