The Best Crossword Puzzle Maker Online
Powered by BrightSprout
Save Status:
or to save your progress. The page will not refresh.
Controls:
SPACEBAR SWITCHES TYPING DIRECTION
Edit a Copy:
Make Your Own:
Crossword Word Search Worksheet

Darwin's Theory of Evolution

After you have completed the puzzle please place THESE definitions on the LINED side of your 9 photo-flashcards.
Across
Random changes in allele frequencies that occur in small populations.
Where organisms are "better" suited for their environment and have adaptations that allow them to survive and reproduce.
Inherited characteristics that increases an organism's chance of survival.
Observed how the characteristics of plants and animals varied on different islands of the Galapagos.
Says that "all" organisms are related to one another but "come with changes" from other species over time.
Movement of individuals "into" an area occupied by an existing population.
The ability of an organism to survive and reproduce in its environment.
Where over generations changes in inherited characteristics increase a species' fitness in its environment.
Movement of individuals "out" of an area.
Where nature provided the variation and man selected those variations that were useful or most liked.
The principle that a single "tree of life" links all living things.
Down
The preserved remains of ancient organisms.
Small traces of ancestral structures that no longer function, like tiny legs on some snakes.
Where members of each species compete for food, space, and other necessities of life.
A well-supported testable explanation of phenomena that has occurred in the natural world?
Darwin's book published in 1859 about natural selection later called evolution.
A similar body part that comes from a common ancestor. Ex. (The bones of bat wings and the bones of the human hand).
"Change over time" where modern organisms have descended from ancient organisms.