Mechanisms of Evolutions

Species

A group of organisms that produce fertile, healthy offspring

What does more derived characteristics share?

A more common ancestor

Outgroup

No derived traits

Homologous structures

Provide evidence of a common a common ancestor

Vestigial Structures

Provide evidence of a common ancestor

Analogous structures

Cannot be used. Evolved to their environment similarly, not from a common ancestor

All mechanisms of evolution lead to ___ ___ ___

Changing allele frequencies

Artificial selection

Human driven evolution

Darwin is responsible for

Natural selection

What are Darwin five ideas

Natural variation

Some variations are more favorable

Over reproduction

Natural selection

Descent with modification

What are Lamark’s ideas

Aquired characteristics

Use vs. Disuse

Used traits stay and unused traits go away