Basis of Classification
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
1
2
3
4
5
Check
Across:
2.
Reptiles
3.
Animals without back bone
5.
able to keep up a relatively high constant body temperature that is independent of that of the surroundings Birds and mammals
Down:
1.
With 3or.more pairs
of legs
4.
Animals with back bone
OK