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2. Which of the following is NOT an example of how the body tries to gain or keep heat?

  • More blood flow to the surface of the skin
  • Reduced sweating
  • Shivering
  • Releasing energy from food (respiration)

3. Which of the following is an example of positive phototropism?

  • Plant roots grow with the pull of gravity
  • Plant shoots grow towards light
  • Plant roots grow with the pull of gravity
  • Plant shoots grow away from light

4. In the process of spreading malaria, the mosquito is the...

  • Pathogen
  • Parasite
  • Vector
  • Host

5. What is the purpose of the iris?

  • Focuses light onto the retina
  • Controls the amount of light entering the eye
  • Carries nerve impulses to the brain
  • Refracts light rays
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