Scientists are always thinking about ways to improve
experimental design. In the text’s potato chip
experiment, which of these might do so?
a. show a different movie
b. exclude teenagers as group members
c. collect uneaten chip remains and weigh them for
both groups
d. provide free drinks
e. use a smaller theater
Answer: c
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The poliomyelitis virus is in the picornavirus family in the subgroup
A. adenoviruses. B. enteroviruses. C. arboviruses. D. dermotropic.
What is a major argument for the dumping of radioactive wastes in the deep-sea trenches of the ocean? a. Animals are only harmed if the substances should leak
b. There is more space in the ocean than on land. c. The waste would be taken to the mantle via subduction zones. d. There is no habitat damage.
DNA is present in all of the following human cell types except ________
A) skin cells B) erythrocytes (mature red blood cells) C) leukocytes (white blood cells) D) hair E) buccal (cheek) cells
_______ store materials required by bacteria
Fill in the blank(s) with the appropriate word(s).