Check HW (bacteria & OR) Date: 10/12/16 Topic: Evolution Review Day Page # ___ Must wear uniforms/IDs! 10/12/16 EBHS Admit Slip What is the difference between homologous, analogous, and vestigial structures? Check HW (bacteria & OR)

Evolution MCAS Open Response HW Review Evolution MCAS Open Response

Homologous Structures Similar structures (ex. bones) in different species, due to common ancestry

Analogous Structures Similar shaped body parts in different species due to common function; NOT due to common ancestry

Vestigial Structures Remnant structures (bones/organs) in today’s species that are no longer used (were used in ancestral species) Shows organisms have changed over time

Natural Selection In pairs, describe an example of natural selection and list the steps in which it occurs

Steps of Natural Selection* 1) Populations of individuals compete for survival 2) As they reproduce, random mutations occur that can lead to new traits 3) New traits may lead to increased or decreased survival rates 4) Organisms that survive reproduce and pass on their traits 5) Populations evolve as natural selection selects “for” or “against” certain traits, and they become more common in the population

Selected “for” or “against” ? For = trait allows organisms to survive better in specific environment Against = traits influences organism to die easier in specific environment

Brain development We have bigger brains than our ancestors used to… Does that mean larger brains were selected for or against? Why might we have developed big brains? https://www.youtube.com/watch?v=H9l c-LZ_7dg

Evolution Review Game http://www.superteachertools.us/jeo pardyx/jeopardy-review- game.php?gamefile=1763135

Socrative.com Study tool!!!