This printable crossword puzzle on the topic of Ecology & Evolution has 10 clues. Answers range from 4 to 9 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
makes its own food
eats left overs
finds its own food
swimmes around
food for the fish
cleans the tank
produces food for animals
it hydrates animals and fish
single sell life form
living thing that only eats meat