Straps of dense connective tissue that join muscles to bones are called:
a. marrow
b. joints
c. ligaments
d. tendons
e. vertebra
d
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Lemon juice has a pH of 2.0, therefore, ____
a. [H+] < [OH-] b. [H+] = [OH-]
c. [H+] = 0 d. [OH-] = 0 e. [H+] > [OH-]
Refer to Figure 7-2. The line on the graph labeled C represents the:
a. activation energy with an enzyme.
b. activation energy without an enzyme.
c. change in free energy.
d. change in entropy.
e. change in enthalpy.
Mutation has what effect on populations?
a) It creates or increases potential genetic variation. b) It allows fixation to occur. c) It reduces genetic variation. d) It creates Hardy-Weinberg equilibrium. e) It makes populations less likely to evolve.
Organic molecules that organisms need, but cannot synthesize all by themselves, are called:
a) carotenoids b) trace elements c) growth factors d) nutrients