My Crossword Maker Logo
Powered by BrightSprout
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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Across
3
Millions of years old
5
body structures that look similar, but have different functions
7
all the organisms of the same species that live in the same area at the same time
8
A characteristic
11
body structures that have similar function, but look different
13
organisms that are best adapted to their environment are most likely to survive
16
A person who studies plants and animals
19
Fossil dating that compares ages
20
a slight change in a trait among individuals of the same species.
21
Study of the "family tree" of an organism's evolution
Down
1
Famous for his theory of evolution
2
A trace of a once living organism turned to rock
4
an inherited trait that increases an organism's chance of survival
6
A "mistake" in the copying of DNA that can get passed down
9
A body structure that has lost its original function through evolution
10
An adaptation that helps you blend in
12
Fossil dating that tells you how many years old something is
14
Last organism of a species dies
15
Study of classifying organisms
17
a section of DNA on a chromosome
18
Type of breeding where humans choose desired traits