This printable crossword puzzle on the topic of Ecology & Evolution has 21 clues. Answers range from 5 to 12 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
a living thing
small building blocks that make up all living things
the combination of chemical reactions through which an organism builds up or breaks down materials
a change in a living thing's surroundings that causes the organism to respond
the process of change in an organism's life
reproduction with only one parent
reproduction with two parents
organisms that make their own food
organisms that cannot make their own food
the maintenance of stable internal conditions
scientific study of how organisms are classified
the most specific classification of living things
the most general classification of living things
unicellular organism without a cell nucleus
a dense area in a cell that contains nucleic acids
organisms with cells that contain a nucleus
preserved remains or traces of an organism that lived in the past
a trait that increases an organism's ability to survive and reproduce
the process of change over time
any difference between individuals of the same species
selection type when only organisms with desired characteristics are bred