My Crossword Maker Logo
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
Rate This Puzzle:
Log in or sign up to rate this puzzle.

Per 6: Natural Selection

Write all words and clues on INB 42
Across
Hemoglobin protein carries oxygen in all mammals is this kind of trait
An organism's ability to ___ and survive and have its offspring survive
Mechanism by which organisms are best suited to their environment
Ostrich legs are built to reach speeds of 70 mph to outrun predators is an example of this kind of trait
Selection pressures include competition, prediction, environment, climate, food availability, and ______
Down
Male lions kill offspring of other male lions is an example of this kind of trait
A condition required for natural selection to occur involving many offspring
Differences in DNA due to mutations and sexual reproduction
Natural selection is driven by selection ___
Survival of the fittest is important to a population to remove inferior___ from the gene pool
Type of descent which passes on beneficial traits to the next generations
Traits are based on improving this