~Science Crossword~

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