Which statement is true of genetic mutations?
A. Mutations have mostly beneficial effects.
B. Mutations commonly increase the survivability of affected offspring.
C. Mutations rarely result in problems for the affected offspring.
D. Most mutations have negative consequences.
Answer: D
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The discussion of motherhood examines infant mortality rates for several countries. According to these data,
a. the United States and Canada have the lowest infant mortality rates in the world. b. in some countries in Africa, more than 10% of infants die before their first birthday. c. the countries with the lowest infant mortality rates are all located in Europe. d. all the developed countries have almost identical infant mortality rates.
Hormones exert their effects ____.
A. similarly to metabotropic neurotransmitters B. similarly to ionotropic neurotransmitters C. by attaching to special receptors on muscle fibers D. by being metabolized and converted via presynaptic cells
Sleep deprivation in adolescents can affect the development of the
A) hypothalmus. B) prefrontal cortex. C) amygdala. D) cerebellum.
Which of the following is true about how we die?
A) The greatest dignity in death is in the integrity of the life that precedes it. B) Societies do not need a definition of death because it happens at a single point in time. C) The brain death standard always solves the problem of when to halt treatment. D) Today, medical science can guarantee the idealized, easy end most people want.