~Science Crossword~

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Across
  1. 1. / Frogs, toads, newts and salamanders
  2. 3. / Mammals that nourish the baby inside the mother's body by the placenta
  3. 4. / Sharks and rays belong to this phylum
  4. 8. / They lay eggs (opposite of the mammal)
  5. 9. / Animals that are given birth to and develop in the mothers pouch
  6. 10. / the name given to birds that are not mammals
Down
  1. 1. / the word given to animals with no jaw and are parasites
  2. 2. / Bony fish that have fins on the back and on the side
  3. 5. / the name given to vertebrates
  4. 6. / Includes animals that don't reproduce by eggs
  5. 7. / snakes, crocodiles and lizards