Evidence of Evolution I. The Fossil Record- Fossils

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Presentation transcript:

Evidence of Evolution I. The Fossil Record- Fossils Fossil record- a hisitorical sequence of life. Vestigial structures- remnants of once-useful structures. Example- whale

Vestigial Structures

II. Comparing Organisms Comparing Skeletal Structures Comparing DNA from Different Species- all living things contain DNA Comparing embryonic structures

How does evolution happen? Natural Selection Overproduction- each species produces more offspring than will survive to maturity Genetic Variation- individuals in a population are slightly different from one another (unique traits- size, color, and ability to find food). Struggle to Survive- Competition Successful Reproduction- The individuals that are well adapted to their environment will possess better traits for living in their environment, are more likely to survive and reproduce.

sponge Using some of your chosen vocabulary words from yesterday’s reading, explain how organisms change over time.