Why are many bacterial infections more difficult to treat now than they were fifty years ago?
a)
because there are more types of bacteria now.
b)
because bacteria have evolved resistance to antibiotics.
c)
because bacteria reproduce at greater rates than in the past, since there are more people on earth.
d)
because treatment of virus infections consumes many antibiotics that were formerly used only for bacteria.

The characteristic of stress responses that refers to the degree or extent of the behavior is a. intensity. b. frequency. c. duration. d. stress.

According to federal dietary guidelines which of these foods is overconsumed

As you sit in the library with your friend studying for your weekly quiz on the integumentary system, you come upon an article about the hazards of prolonged exposure to the sun's rays. your curious nature leads you to research the subject further. you're fascinated to learn that minimal exposure to the sun allows you skin to manufacture vitamin d, which is important to maintain homeostasis. you also read that although sunscreen can protect you from the ultraviolet (uv) rays of the sun, some medications can actually increase a person's sensitivity to the sunlight.