Evolution Part 3 - Natural Selection
Biology

Evolution Part 3 - Natural Selection



EVOLUTION PART 3 ? NATURAL SELECTION
Ms. Carter

MUTATIONS are changes in our DNA. Sometimes, mutations are harmful and cause death. Other times, mutations give the individual an advantage and allow these individual to survive certain environmental conditions better. Organisms with good mutations survive and have offspring. Some offspring inherit the good mutation, survive, have children and so on.  Mutations that allow organisms to survive and pass on to future generations are part of the evolutionary process.

http://www.teachersdomain.org/resource/tdc02.sci.life.gen.doubleimmunity/
Background essay: Double Immunity
  1. Why are some people resistant to the HIV virus today?
Video:  Double Immunity
  1. Why doesn?t the virus enter the cells of people with this mutation?
  2. What is the evolutionary importance of the mutation that cause pople to durvive the plague 700 years ago?

http://www.pbs.org/wgbh/evolution/library/01/2/l_012_02.html
Watch the video and read the essay below it
  1. Why are some people resistant to malaria?
  2. If sickle cell is lethal, why is it still present in populations? How is it pass on from generations to generations? Explain.

Some organisms survive the hazards of their environment by changing themselves to blend with their surrounding.

http://www.teachersdomain.org/resource/tdc02.sci.life.evo.lp_howevowork/

VIDEO: Evolution of Camouflage
Read the essay and watch the video:
  1. Explain how is camouflage related to evolution?

http://www.teachersdomain.org/asset/lsps07_int_nowherehide/
After playing this interactive write a short essay on how camouflage allows for natural selection to take place in a prey/predator relationship.





- Q: Explain Why Mutations For Antibiotic Resistance Spread So Rapidly Among Bacteria
Frequent use of antibiotic kills many bacteria, creating a selection pressure. As a result, bacteria with mutations that give them resistance to a particular antibiotic have an advantage over the other bacteria that do not. They survive to reproduce more...

- Natural Selection
What is Natural Selection? Natural Selection was a evolution theory introduced by Darwin in 1859. His theory was that the organisms that were best adapted and equipped to compete in their environment would survive and pass on their strong genetic traits...

- Evolution
Evolution: Darwin vs. Lamarck Darwin's theory is called descent with modification. This means that he believed that each generation of an organisms offspring is in someway different than the previous generation. Which in conclusion would mean that...

- Interactions Among Organisms
INTERACTIONS AMONG ORGANISMSSymbiotic Strategies http://www.teachersdomain.org/resource/nat08.living.eco.humeco.lpsymstra/  Read ?OVERVIEW? and answer the following questions:1.     Write a sentence (using your own words) explaining...

- Genetic Engineering
GENETIC ENGINEERING WEBQUESTMs. Carter ? Gunderson High School Bioengineered Foods? http://www.teachersdomain.org/resource/tdc02.sci.life.gen.lp_bioengfood/ INTERACTIVE: Engineering a Crop: Transgenic ManipulationRead the Background Essay and answer these...



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