This printable crossword puzzle on the topic of Ecology & Evolution has 19 clues. Answers range from 4 to 20 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
best organisms adapted to their environment; weak leave fewer
way of hiding or coloring something; looks like surrounding
a change in an organism over time
to have young or offspring
condition that causes harm to the health of a person, animal, or plant
an animal being hunted
an abnormal change or alteration in a structure; opposed to gradual evolutionary change
everything that surrounds a particular type of living
the young of a particular human, animal, or plant
the diversity of life forms on earth or part of the earth; genes, species, and ecosystems
group of living things that can mate with one another
the process or act of trying to win
animals best suited adapt easier, stay alive; less suited die out
degree which something varies; amount of change
the theory that describes all life forms had related ancestors
similar in form or function, but of different evolutionary origin
a common evolutionary origin
pertaining to being vestige
the branch of science that concerns development of embryos