My Crossword Maker Logo
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.

Evolution and Natural Selection

Teacher: Jurca
Across
All the genes in a population
The process by which a species changes over time
A random change in a gene pool caused by chance events
A way to determine the age of a fossil by measuring the amount of radioactive elements in it
The survival of offspring that have favorable traits
Traveled to the Galapagos Islands to study the inheritance of traits in finches
Down
A way to estimate the age of a fossil by comparing its position in a rock layer
The record of Earth's history based on the types of organisms that lived at different times
A trait that helps an organism to survive in its environment
A difference in a trait among individuals in a species
The remains of an organism that lived a long time ago