animals

123456789101112131415
Across
  1. 2. are the largest phylum of animals wirhout body cavity like planaria
  2. 3. members of the class amphibia like frogs,salamanders and caecilians
  3. 7. a phylum of marine animals they include sea stars and sea urchins
  4. 10. cold blooded,have scaly skin and lay eggs
  5. 12. refers to a relationship which one is benefited while the other is neither benefited nor harmed
  6. 14. is simply known as "give and take" relationship
  7. 15. are small terrestrial invertebrates which have a hard exoskeleton
Down
  1. 1. they live in soil and feed on bacteria
  2. 4. animals with backbone
  3. 5. have segmented body,an exoskeleton and legs with joints
  4. 6. animals without backbone
  5. 8. have beaked jaws,lay eggs and had a strong yet lightweight skeleton
  6. 9. vertebrates which live in water and respire with gills
  7. 11. occurs when species fight for the limited sources
  8. 13. they form the class mammalia.they have fur or hair and a very precise kind of temperature regulation