Anoxic Atmosphere

Early Earth :
Evolutionary Events

Biological Evolution

Natural Selection

Why is Evolution Vital?

Genetic Variation :
Adaptive Trait

Genetic Variation:
Mutations

Genetic Variation:
Sexual Reproduction

Directional Selection

Stabilizing Selection

Disruptive Selection

Divergent Evolution

Convergent Evolution

explain lactose tolerance in humans

Species

Population

Allopatric Speciation

Extinction

Endemic Species

Earth Mass extinctions

Biosphere

Ecosystem

community

population ecology

community ecology

Ecosystem ecology

Habitat

Habitat use

habitat selection

sympatric speciation

Niche

specialists

Generalists

Population size

Population density

Population Distribution

Birth and Death Rates

survivorship curves: Type 1

survivorship curves: type 2

survivorship curves: type 3

exponential population Growth

what factors restrain growth?

Carrying Capacity

Density-dependent Factors

Density-Independent Factors

Biotic Potential

K-Selected Species

R-Selected Species