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
Answer Key:
Edit a Copy:
Make Your Own:
Crossword Word Search Worksheet
Rate This Puzzle:
Log in or sign up to rate this puzzle.

Biological Change

Across
Millions of years old
body structures that look similar, but have different functions
all the organisms of the same species that live in the same area at the same time
A characteristic
body structures that have similar function, but look different
organisms that are best adapted to their environment are most likely to survive
A person who studies plants and animals
Fossil dating that compares ages
a slight change in a trait among individuals of the same species.
Study of the "family tree" of an organism's evolution
Down
Famous for his theory of evolution
A trace of a once living organism turned to rock
an inherited trait that increases an organism's chance of survival
A "mistake" in the copying of DNA that can get passed down
A body structure that has lost its original function through evolution
An adaptation that helps you blend in
Fossil dating that tells you how many years old something is
Last organism of a species dies
Study of classifying organisms
a section of DNA on a chromosome
Type of breeding where humans choose desired traits