Natural Selection and Evolution Vocabulary

Vocabulary flashcards based on the Natural Selection learning guide.

Evolution

The gradual change in living organisms over long periods of time, which can lead to the development of new species and diversity on Earth.

Natural Selection

The process where organisms with better-adapted traits survive and reproduce more successfully than others.

Charles Darwin

The scientist who developed the theory of natural selection after observing organisms during his travels, especially on the Galápagos Islands.

"Survival of the Fittest"

A common summary of natural selection where "fittest" means best adapted to the environment, not strongest.

Variation

Differences among individuals in a population, which may include size, color, shape, or behavior.

Evidence of Evolution

Observations supporting evolution, including fossils of ancient organisms, similar body structures among species, DNA similarities, and observations of living organisms changing over time.

Steps of Natural Selection

1. Variation exists among organisms. 2. Organisms compete for resources. 3. Individuals with favorable traits survive. 4. Survivors reproduce and pass on traits. 5. Over time, populations change.