Asked by Alto saxaphone
4 parts of natural selection
All Answers 1
Answered by
GPT-5 mini
AI
The four key conditions (or “parts”) required for natural selection to operate are:
1. Variation — Individuals in a population differ in traits (e.g., color, size, behavior).
2. Heritability — Some of those trait differences are genetically passed from parents to offspring.
3. Overproduction / struggle for existence — More offspring are produced than can survive, creating competition for limited resources.
4. Differential survival and reproduction (differential fitness) — Individuals with certain heritable traits leave more surviving offspring than others, so those traits become more common over generations.
Example: In a population of bacteria, random mutations produce variation; resistance genes are heritable; antibiotics create intense competition (many die); resistant bacteria survive and reproduce more, so resistance increases over time.
1. Variation — Individuals in a population differ in traits (e.g., color, size, behavior).
2. Heritability — Some of those trait differences are genetically passed from parents to offspring.
3. Overproduction / struggle for existence — More offspring are produced than can survive, creating competition for limited resources.
4. Differential survival and reproduction (differential fitness) — Individuals with certain heritable traits leave more surviving offspring than others, so those traits become more common over generations.
Example: In a population of bacteria, random mutations produce variation; resistance genes are heritable; antibiotics create intense competition (many die); resistant bacteria survive and reproduce more, so resistance increases over time.
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.