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.