G7- I can list examples of changes in genetic traits due to natural and manmade influences

What is Natural Selection?  Write it on your white board

Which of the following is an example of Natural Selection? A. Humans breed cows to produce 8 gallons of milk per day B. Farmers plant only the biggest, tastiest ears of corn and as a result will get more big, tasty ears of corn C. Horses were once short and slow to escape predators. Today they are taller and run very quickly, making it easier to escape predators

What is Artificial Selection?  Write it on your white board

Which of the following is an example of Artificial Selection? A. Millions of years ago, plants were short and did not have root systems, but now plants can grow very tall and have large root systems B. Over time, birds bones have become hollow making them lighter for easy flying C. Tomatoes at the grocery store stay fresher longer because humans like eating fresher tomatoes and therefore grow only fresh tomatoes

Read the following: “Antibiotics work to kill bacteria. Bacteria are single-cell organisms. If bacteria make it past our immune systems and start reproducing inside our bodies, they cause disease. We want to kill the bacteria to eliminate the disease.” Raise your hand if you have ever taken antibiotics for anything

Read the following: “An antibiotic is a selective poison. It has been chosen so that it will kill the desired bacteria, but not the cells in your body. Each different type of antibiotic affects different bacteria in different ways. For example, an antibiotic might stop a bacterium's ability to turn sugar into energy, or its ability to build its cell wall. When this happens, the bacterium dies instead of reproducing.” Summarize the idea of this paragraph with your partner

Read the following: “Antibiotics do not work on viruses because viruses are not alive. A bacterium is a living, reproducing organism. A virus is just a piece of DNA(or RNA). A virus injects its DNA into a living cell and has that cell reproduce more of the viral DNA. With a virus there is nothing to "kill," so antibiotics don't work on it” Can Viruses (or other non-living things) Adapt? Why do you think this?

Think about “Survival of the fittest.” New antibiotics always have to be created to treat colds and flu. Why do you think this happens?

Antibiotics Why is it a mistake to take antibiotics for viral cold/flu? A. Bacteria becomes resistant B. The virus becomes resistant C. Antibiotics are expensive D. Antibiotics taste bad

Peppered Moths and Adaptations  807djLc 807djLc What characteristic of moths was “selected” to survive when the soot turned the trees black?

Peppered Moths and Adaptations Because the trees turned black, were there more black peppered moths, or white peppered moths in the next generation? Why is this?

Farmers are always changing the types of insecticide to fight pests because… A. Insecticides actually make insects healthier B. Chemical labs make more money by making new insecticides C. This is a tradition that farmers always follow D. Insects develop resistance to old insecticides

Write down two examples of adaptations that organisms have changed because of Natural Selection

Write down two examples of adaptations in organisms that have changed because of Artificial Selection

A tangelo is a cross between a tangerine and a grapefruit. Why do plant Scientists make genetic crosses like this? A. The new offspring may have desirable traits B. They are accidents that scientists cannot prevent from happening C. Tangelos are better than tangerines or grapefruit D. We need to keep discovering new fruits because the fruits we have are not healthy enough

Human beings walk upright. What adaptive advantage does this provide? A. We run faster than other animals B. We see in more color than other animals C. It allows us to use our hands D. It gives us the ability to hear better *Is this adaptation a result of Natural Selection or Artificial Selection?

Asexual v. Sexual A disastrous infection has the capability to wipe out an entire group of organisms, but some organisms may survive if they have the right traits for survival. Does an Asexual population have a better or worse chance of surviving the disastrous infection than a Sexual population? Discuss what you think with a partner and write it on your whiteboard