Victims who are bullied repeatedly and brutally may react by ________

Martha is writing a paper that addresses a process in which sensory receptors become less sensitive to repeated presentations of the same stimulus. What is the primary topic of Martha's essay?

a) sensation b) sensory fatigue c) sensory adaptation d) discrimination

Studies of mutation demonstrate that

A) some mutations occur spontaneously, simply by chance. B) mutations are never desirable. C) females are more susceptible than males to harmful mutations. D) exposure to nonionizing forms of radiation, such as microwaves, can cause genetic damage.