Remember… BIO EOCT is in Thursday, Happy Dec. 1st! Please turn to page 357! Today’s opener is the EOC review questions, #1-6 Write the answers only…read slowly, do your best! Remember… BIO EOCT is in NINE SCHOOL DAYS!!!

11.6 KEY CONCEPT Evolution occurs in patterns!!

Evolution through natural selection is NOT random. Natural selection can have direction. The effects of natural selection add up over time.

evolution toward similar traits in unrelated species Wings, complex eyes, etc.

evolution toward different traits in closely related species red fox kit fox How do convergent and divergent evolution illustrate the directional nature of natural selection? ancestor

Species can shape each other over time. 2 or more species evolving together evolutionary paths become connected evolve in response to changes in each other Both benefit from adaptations!! Both respond to competitive pressure from each other!!

Beneficial relationship!!! Ant lives in Acacia plant, protects plant

Competitive/evolutionary relationships!!

Species can become extinct  elimination of a species from Earth!!! occur continuously at a very low rate Same as speciation affects a few species/small area local changes in environment

rare but much more intense!! destroys many species at global level caused by catastrophic events?? at least 5 mass extinctions in last 600 million years

episodes of speciation occur suddenly in geologic time followed by long periods of little evo. change Diversification of one ancestral species into many descendent species Adapted to a wide range of environments

Many species evolve from one species during adaptive radiation. ancestral species diversifies into many descendent species descendent species usually adapted to wide range of environments

REVIEW SHEET from last week… DUE TOMORROW REVIEW SHEET from last week… DUE TOMORROW! Also due: Vocab Ch 11 Ch Review

Open-Notes Pop Quiz!