Across
- 2. A limbless cold-blooded vertebrate animal with gills and fins living wholly in water.
- 4. A warm-blooded egg-laying vertebrate animal distinguished by the possession of feathers, wings a beak, and typically by being able to fly.
- 6. Animal of a large group distinguished by the possession of a backbone or spinal column,including mammals,birds,reptiles,amphibians and fishes.
- 8. Are sensitive to touch and vibration.
- 9. A small arthropod animal that has six legs and generally one or two pairs of wings.
- 11. An invertebrate of a large phylum with includes snails, octopuses. They have a soft unsegmented body and live in aquatic or damp habitats, and most kinds have and external.
- 12. A large group of mainly aquatic arthropods which include crabs, lobsters and shrimps.
- 14. Vital for flight and endothermy (they give excellent insulation against heat loss)
- 17. A cold-blooded vertebrate animal.they are distinguished by having an aquatic gill-breathing larval stage followed (typically) by a terrestrial lung-breathing adult stage.
- 18. The process of transformation from an inmature form to an adult form in two or more distinct stages.
- 19. Covered in mucus help streamling for swwiming.
Down
- 1. The hard protective outer case of a mollusc or crustacean.
- 3. An animal lacking a backbone, such as an arthropod, mollusc, annelid.
- 5. Very light since no bone or teeth.
- 7. Small insect with long, thin legs Two pairs of wings and antena sense chemicals in the environment.
- 10. An arthropod of a group that includes the centipedes, millipedes. Have elongated bodies with numerous leg.
- 13. These are important sense organs.
- 15. A vertebrate animal. they are distinguished by having a dry scaly skin and typically laying soft shelled eggs on land
- 16. A warm blooded vertebrate animal that is distinguished by the possession of hair or fur females that secrete milk for the nourishment of the young.
- 20. A thick, hardened shell for protection against predators.