B1 - Understanding Organisms Revision

1. Which of the following characteristics are NOT caused by both inheritance and environment?

  • How tall a person is (height)
  • Having ears without lobes
  • A persons body mass
  • How intelligent a person is
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2. What are proteins made up of?

  • Amino acids
  • Simple sugars
  • Glycerol
  • Adipose tissue

3. What is the purpose of the iris?

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

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

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

5. What is the first stage in a spinal reflex?

  • Stimulus
  • Effector
  • Receptor
  • Reponse

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