Which of the following public health methods impacted the quality of life through the 20th century by lowering the incidence of many infectious diseases?
A. Water treatment
B. Antimicrobial agents
C. Immunizations
D. Strict sanitation guidelines
E. All of the choices are correct.
Answer: E
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How do pancake tortoises protect themselves from predators?
a. Their coloration serves as a disguise. b. They emit an undesirable scent. c. They have large jaws with teeth. d. They puff themselves up and become wedged in between cracks in rocks. e. They retreat into their shell.
Bird wings and insect wings are considered to be:
a. homologous structures. b. homogenous structures. c. vestigial structures. d. divergent structures. e. homoplastic structures.
What is the purpose of the fragrant oils found in rosemary and thyme?
A) They encourage humans to pick them and spread their seeds. B) They protect the plants from fire. C) They help fuel fires, to which they've become adapted. D) They discourage humans from consuming the plants.
A niche is
A. a place where an organism lives. B. the way an organism goes about living. C. a place where you put yourself. D. an animal that is able to slip through a narrow opening.