Do Now Day 2 Draw the meaning of “survival of the fittest”. In one sentence explain the endosymbiont hypothesis. What is 1 of the 4 requirements of natural selection? (Hint: the video with Charles Darwin)

A. Structural B. Behavioral C. Physiological Adaptations are a huge part of natural selection. An adaptation is any inherited trait that gives an organism to an advantage in the environment (its niche). There are three basic types of adaptations: A. Structural B. Behavioral C. Physiological Adaptation Rap

Structural Adaptations Structural adaptations include defensive structures, camouflage, and mimicry. Defensive structures are like thorns on a branch. Camouflage is like the bug that looks like a leaf. Mimicry occurs when a harmless species (mountain king snake) resembles a harmful species (coral snake) using coloration. Camouflage and Mimicry

Behavioral Adaptations Herding for protection (such as groups of cows, sheep, prey animals) Schooling of fish Tuna Growling warns others to step back

Physiological Adaptations Venom has a chemical that clots blood Venom and Blood Phototropism is when plants grow towards the light Secreting slime Hagfish Slime Lizard Eye Adaptation

Independent Practice Pick 2 Create an organism that has a structural, behavioral, or physiological adaptation. Explain: What is its mechanism? How is it an advantage? Why is the better choice than the other 2 types? Include a drawing of it. Create a rap or poem about the differences between the 3 types of adaptations and include an example for each adaptation. Make a chart of the 3 types of adaptations. What is an example of each and explain that advantage.

What was your favorite part? What was your least favorite part? Do Now How was your weekend? What was your favorite part? What was your least favorite part?

Mod 10- Evolution Day 3 of 5

Mechanisms of Evolution Misconceptions about Evolution 1. Individuals don’t evolve; populations do. The population is the smallest unit of evolution because acquired traits in an individual cannot be passed on (inherited by offspring). However, different traits already present in a population can be “selected” for or against and then changes the population.

Natural Selection 2. Evolution occurs when the gene pool (all of the genes of a population) changes. A change in genotype may lead to a change in phenotype. Evolution acts on the phenotype.

Mutations are random changes in DNA and may lead. to a new phenotype Mutations are random changes in DNA and may lead to a new phenotype. Mutations provide the raw material for evolution, diversity. For example, a mutation causing white fur in Arctic foxes may lead to better camouflage in winter. There are three basic patterns by which natural selection occurs:

i. Stabilizing selection favors the “average” phenotype in a population. ii. Directional selection favors ONE of the extreme ends of the “typical” distribution. iii. Diversfying (or Disruptive) Selection favors BOTH of the extreme ends of the “typical” distribution.

Independent Activity- PICK 2 Draw and explain the different patterns of selection: stabilizing, directional, and diversifying (or disruptive) Complete the online activity found here:http://www.pbs.org/wgbh/evolution/darwin/origin/index.html and write 15 facts you learned from the activity How would a mutation benefit an individual if the environment changed? Create a poem or rap!

Exit Ticket Help me become a better teacher! What is one thing I do (either personally or in class) that you enjoy? What is one thing that I do (either personally or in class) that you do not like? How can I fix it?