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6. What is a stimulus?

  • a change in your environment which you may need to react to
  • a change in your body that causes movement

7. Which one is not extinct?

  • Homo neanderthalensis
  • Homo Sapiens
  • Home erectus

8. Hormones are chemically released into the blood?

  • True
  • False

9. What is Biodiversity?

  • the number of plants growing in an area
  • the number and variety of organisms found in an area
  • the number of humans living at home

10. Detecting stimuli is the job of your .....?

  • Nerve cells
  • sense organs
  • Central Nervous System