Science summative project on evolution and natural selection.
Variation of Offsrping
A turtle species with soft-shells reside at the bottom of a canyon. Over time they have begun to overpopulate as there are no threats to their survival.
Survival of the Fittest
Some of the turtle offspring are born with a mutated gene, which causes a defect in their proteins. It results in them having the hard-shelled trait and dark gray shells instead of having soft-shells like the rest of the species.
Caused by abrupt large gusts of winds, once stable rocks begin to fall off of the top of the canyons, hurtling at the turtles who live at the canyon's base.
Changes in Gene Pool
The turtle species now compete for their survival against the falling rocks. The hard-shelled turtles have an advantage, as their shells protect them against the rocks. However, the soft-shelled turtles are at a disadvantage, as their shells aren't strong enough to protect them, and being hit by a rock kills them. Eventually, natural selection causes the soft-shelled turtles to die off.
As the hard-shelled turtles survive more they have more reproductive success. Their offspring inherit the hard-shell trait and the species begins to adapt and become mostly hard-shelled.
Over a few generations, the turtle species has evolved to become composed of mainly hard-shelled turtles. Soft-shell turtles still remain but are much less ubiquitous in the population than they once were.