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.

Theory of Evolution

Across
Inherited trait that helps an organism survive and reproduce in its environment.
Process by which populations change over time
A group of closely related organisms that can mate to produce fertile offspring.
It usually makes more offspring than the environment can support.
Natural selection can act only on acquired _______.
Source of variation which means change in genetic material
___________ SELECTION is the practice by which humans select plants or animals for breeding based on desired traits
Because of environmental change, dinosaurs eventually became ______
Survival of the _________ explains theory of evolution
Down
Charles _______ is the Father of Evolution
Naturally occurring DIFFERENCES
It occurs when all members of species have died.
All of the individuals of a species that live in an area at the same time.
Natural ______: the process by which organism that inherit advantageous traits tend to reproduce more successfully