Atoms or molecules that contain an unpaired electron from a broken covalent bond are known as:
a) Hydroperoxyl ions
b) Free radicals
c) Hydrogen ions
d) Antioxidants
Ans: b) Free radicals
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The genetic code is made up of units consisting
of how many nucleotides? a. 2 b. 3 c. 5 d. 6 e. 9
Although the carrying capacity of a population is determined by food availability, what other factor affects the carrying capacity?
A) the energy fluctuations of the sun B) clean air and water C) the prevalence of war D) a woman's choice to not have children
Which of the following would be an example of sexual selection?
A. a sex ratio of 5 females to 1 male B. females avoid aggressive males C. male deer with poor eyesight are more often killed by accidents D. well-nourished females produce more offspring
A reaction that uses the absence of hemolysis of red blood cells to indicate an antigen—antibody reaction is called a(n)
A) agglutination reaction. B) complement fixation. C) immunofluorescence. D) neutralization reaction. E) precipitation reaction.