Happy Mondays! 2/13/17 Which scientist proposed that organisms “acquired traits” throughout their lifetime, and then passed those traits on to their.

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Happy Mondays! 2/13/17 Which scientist proposed that organisms “acquired traits” throughout their lifetime, and then passed those traits on to their offspring? A. Darwin B. Lamarck C. Mendel D. Wallace The process by which species of organisms change over time is referred to as acquired traits Darwinism evolution fitness

Natural Selection The ability to survive and reproduce based off of differences in phenotype Fit vs Unfit

Right vs Wrong Right! Wrong! Organisms who has “fit” genes can compete, survive, and reproduce to pass on favorable genes. Right! Lamarck – Organisms will “acquire traits” in order to survive. Ex- Giraffes stretch their necks in order to reach food. Wrong!

Patterns of Natural Selection Directional Stabilizing Disruptive

Directional Selection Selection against one extreme Fit to be ONE extreme

Stabilizing Selection Selection against both extremes Fit to be AVERAGE

Disruptive Selection Selection against the average It is fit to be BOTH extremes

Practice Babies that are born too small can lose heat too easily and may die, whereas babies being born too large can lead to complications during childbirth and the death of the mother or the baby. Identify selection type. A. Disruptive B. Stabilizing C. Directional

Practice Robins typically lay up to four eggs. Larger clutches may result in malnourished chicks, while smaller clutches may result in no viable offspring. Identify selection type. A. Disruptive B. Stabilizing C. Directional

Practice Light colored moths are better camouflages against light colored areas; likewise dark colored moths are better suited in dark areas. During the Industrial Revolution smog polluted the area shifting the area from light to dark. Identify the selection. A. Disruptive B. Stabilizing C. Directional