Wednesday, February 23, 2011

Extracting DNA from bananas

The DNA from the banana was white and slimy. For the steps, we had to use the blender to blend the bananas to break up the cell wall. We used soap, water, and salt to break down the cell membrane. We then used ice cold rubbing alcohol was used to separate and show the appearance of the DNA. We retrieved the DNA with a metal rod and examined it. I think the DNA would look different if we used vegetables instead because it wouldn't be so slimy just because bananas are not as solid as vegetables.

Friday, February 11, 2011

Darwin Day 2011

I really appreciated having Dr. John Logsdon and Dr. Julie Meachen-Samuel come down and talk to us about their work. I really found it interesting to learn about the work they do and having the chance to actually meet them. I had the privilege to be able to see their presentation twice. It helped me understand the presentations a little bit better.

For Dr. John Logsdon’s presentation, I thought it was pretty interesting. During the first presentation I didn’t quite understand what the purpose of what he was exactly doing, probably because I didn’t catch it the first time. But during the second presentation that I helped host at the Putnam, I realized that he was trying to figure out the evolution of sex. I learned the difference from asexual cells and sexual cells and what they did. I also learned the square dance song for meiosis! I wish I could have heard more about the research he did and what parts he took in figuring this out. I think another thing that would have helped, is if he would have interpreted what some of those things were, because he is a scientist and obviously knows more than we do and some of the things he was talking about that I really didn’t understand. I really liked how he told jokes and made the presentation more interesting with the square dance and fun facts about sex.

Dr Julie Meachen-Samuel did a wonderful job during her presentation. I liked how she talked about how she came to be a scientist and I really liked how she told us what she liked and what she dislikes about being a paleontologist. She did a good job keeping us interested with the videos and showed us the process she would go through to figure out a project. I wish she would have went in more detail of the things she’s done other than just the Smilodon. I really find it interesting about how she finds dead animals and digs them up but I wish she could have told us more about her experiences in doing this. I learned a lot during her presentation about “cats” behavior and the different steps a scientist has to do. I really found her work interesting and I wish I just could have heard a little more of the other projects she has done.

I again thank them for coming down and giving us a presentation. It was a really great experience having them here and learning more about paleontologists and evolutionary biologists. Also, thank you Mr. Hanna for setting this up for us! 

1930's Vocabulary

Reform:

One of the most successful of reforms was the Tennessee Valley Authority, TVA. TVA was a huge public power project in the valleys of the Tennessee River. It was designed to control the floods of the river. It also improved the standards of living by providing cheaper electricity, producing fertilizers, halting soil erosions and improving navigation in the river. People thought the TVA was a socialistic, but  it really did help people in the area.

Make changes for improvement in order to remove abuse and injustice


Relief:

The FERA, Federal Emergency Relief Administration handed out funds to state and local agencies for direct relief of the people who are unemployed. Many families received cash to buy the basic needs, food, clothing, and shelter. The CCC, Civilian Conservation Corps hired many young men for conservation projects. They had to replant forests, control the floods, and improve national parks. There were many relief legislations that primarily focused on helping the unemployed do projects so they would have money. 

Relief is the easing of burden or distress

Bonus Army:




An assemblage of 43,000 marchers, 17,000 World War veterans and their families.