This printable crossword puzzle has 11 clues. Answers range from 5 to 15 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Plants compete for these but animals do not
Characteristics that enable an organism to be successful and survive
Animals, like bears, do this over the winter
When a predator feeds on just one type of prey, there is this between the populations
Differences in characteristics
Eye colour is an example of this type of variation
Variation caused by surroundings
Organisms that have lots in common and can mate to produce fertile offspring
Animals compete for this, to hunt and provide shelter
Animals compete for these to reproduce
Both animals and plants for this