NATURE

123456
Across
  1. 2. part of the plant generally green
  2. 4. part of a plant
  3. 6. little invertebrate animal
Down
  1. 1. any animal of which the female feeds her young on milk from her own body
  2. 3. any member of the class Reptilia
  3. 4. it's a member of a group of vascular plants
  4. 5. an animal that flies