The Four Factors of Evolution
NGSS HS-LS4-2: Construct an explanation based on evidence that evolution results from four factors: potential to increase, genetic variation, competition for limited resources, and proliferation of fit organisms.
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1 Potential to Increase
Species can produce more offspring than the environment can support.
2 Genetic Variation
Offspring inherit traits (color) with slight mutations.
Low
High
3 Competition (Limited Resources)
Organisms compete for a limited supply of food to survive and reproduce.
Food Supply Rate:
Medium
4 Differential Survival
Organisms with advantageous traits (camouflage) are less likely to be eaten by predators.
Environment Color (Selection Pressure):
Predators automatically eat the most visible organisms.