animals and plants

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Across
  1. 2. plants that do not contain chlorophyll
  2. 3. animals that breathe using gills
  3. 4. a small green plant with leaves but without a stem
  4. 8. these animals have a scaly skin
  5. 9. animals with backbones
  6. 11. green plants with leaves and roots but no seeds
Down
  1. 1. these plants have seeds in cones
  2. 5. a way of classifying objects
  3. 6. to sort out living things into groups
  4. 7. animals that have a constant body temperature
  5. 10. the study of living things