An example of one of the ways a pH buffer helps to maintain homeostasis is to
A. increase the H+ concentration if pH decreases.
B. reduce the H+ concentration if pH decreases.
C. reduce the H+ concentration if pH increases.
D. increase the OH- concentration if pH increases.
E. reduce the OH- concentration if pH decreases.
B. reduce the H+ concentration if pH decreases.
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In humans, fertility curves
a. determine the number of individuals entering a population. b. represent reproduction rates versus age of population members. c. do not change throughout the reproductive years. d. are important for females and males. e. do not affect population size.
Test cross
What will be an ideal response?
If an adult human suffered a traumatic injury, could their notochord be damaged?
A. No; the notochord is encased in bone and it not susceptible to damage. B. Yes; because the notochord is deep within the body only a severe injury could damage it. C. Yes; damage to the notochord often results in paralysis. D. No; adult humans do not have a notochord.
Which of the following NOT a protection from
most mutations?
a. very few bases actually change b. the genetic code is redundant c. most of our DNA is non-coding d. genes contain non-coding regions e. all of these protect us from mutations