A packet of nucleic acid enclosed in protein best describes a(n)
a. virus
b. RNA molecule
c. bacterium
d. alga
Ans: a. virus
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Propose a series of procedures to determine whether a patient has a urinary tract infection
What will be an ideal response?
In animals, what is the difference between reproductive cloning and therapeutic cloning?
A) Reproductive cloning uses totipotent cells, whereas therapeutic cloning does not. B) Reproductive cloning uses embryonic stem cells, whereas therapeutic cloning does not. C) Therapeutic cloning uses nuclei of adult cells transplanted into enucleated nonfertilized eggs. D) Therapeutic cloning supplies cells for repair of diseased or injured organs.
Peritonitis may develop in severe cases of
A) giardiasis. B) hepatitis. C) pinworm infestation. D) typhoid. E) peptic ulcer disease.
New World monkeys evolved approximately 30 million years ago. These animals are easy to identify because they
A. have opposable thumbs and binocular vision. B. have protruding noses and prehensile tails. C. have opposable thumbs and protruding noses. D. have flattened noses and prehensile tails. E. have prehensile tails and hair.