Place the following in order of the movement of urine through the urinary system: (1 ) urethra, (2 ) ureter, (3 ) kidney, (4 ) urinary bladder
A) 3, 4, 1, 2 B) 1, 2, 3, 4 C) 3, 2, 4, 1 D) 1, 3, 2, 4 E) 2, 3, 4, 1
Answer: C
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A(n) ________ is a piece of DNA with all of the features necessary for chromosomal replication and which can carry large (up to 1000 kb) pieces of foreign DNA into a host organism.
What will be an ideal response?
In 1928, Frederick Griffith's experiments with Streptococcus pneumoniae suggested that
A) bacteria do not incorporate the DNA of other bacteria. B) attenuated R (rough) bacteria easily revert to the wild type (virulent). C) DNA was conclusively the molecule of heredity. D) heat-killed bacteria could somehow "transform" live bacteria. E) all of the above
invertebrate biologist is conducting research with crabs. Her interest is ecdysis. This implies that she studies
A. tagmatization processes in crustaceans. B. how ommatidia function individually in a compound eye. C. how the HOX gene controls the fusion of the head and thorax into the cephalothorax. D. how ocelli evolved from mere photoreceptors to imaging lens. E. the molting process.
An antibiotic is given repeatedly to treat a recurrent ear infection. It worked initially but now is no longer effective. This indicates that the Streptococcus bacterium
A) is very sensitive to the antibiotic. B) is being treated with an antibiotic that has experienced a manufacturing error, making it infective. C) is infectious only if it is sensitive to the antibiotic. D) experienced natural selection that has allowed the resistant Streptococcus to survive and multiply.