In a snowy environment white rabbits are less likely to be seen by predators than brown rabbits. Over many generations, the white-furred rabbits survive & reproduce more, causing the population to shift toward white fur
Natural selection
When a human body becomes too hot, it produces sweat to cool down; when it becomes too cold, it shivers to generate heat. This internal balancing act to maintain a stable environment is called:
Homeostasis
While most sunflowers in the field had yellow petals, a random change in the DNA sequence of one seed caused the resulting flower to grow bright red petals. This permanent alteration in the genetic code is a:
Mutation
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