At what level of organization does life begin?
a. digestive system
b. cell
c. molecule (water)
d. molecule (DNA)
e. population
ANSWER: b
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Which of the following represents a blind study?
A. The test group does not know whether they are receiving a placebo or the actual treatment, but the researchers do. B. Neither the test group nor the researchers know whether the test group is receiving a placebo or the actual treatment until all the data are collected. C. The test group knows whether they are receiving a placebo or the actual treatment, but the researchers do not know until all the data are collected. D. The test group knows whether they are receiving a placebo or the actual treatment, and so do the researchers.
Red maple tree seeds are dispersed by the wind. This species of tree can be found in fields, woods, and even wetlands. What type of distribution applies to this example?
A) clumped B) uniform C) random D) normal
Which of the following is NOT a use for biotechnology?
A) Identifying human fetuses with particular genetic diseases B) Producing effective and safe vaccines C) Altering food plants to increase yields D) Producing large quantities of particular human proteins E) Altering the intelligence levels of newborn infants
An individual that has two dominant alleles for a trait (AA) is called __________.
Fill in the blank(s) with the appropriate word(s).