Posted by: blausteinhhs | November 23, 2013

Strange Organism is Oldest Eukaryote

Strange New Organism picture

A recent discovery of a single-celled organism found in a lake in Norway is so genetically unique that scientists cannot classify it into one of the known 6 Kingdoms of Life.  Read the article in livescience.com that explains this discovery. Click here to access the article.

After reading the article answer the following questions in FULL Sentences and then Post.

  1. Why do scientists call a newly discovered single-celled organism ‘mankind’s furthest relative”?
  2. Why is it so unique?
  3. Why did they place it in the Protist kingdom?
  4. What are organisms with membrane-bound internal structures are called? Give an example of a membrane-bound organelle.
  5.  Why isn’t this organism an animal, plant, fungi, algae or protist?
  6. What are flagella? How many does this organism have? How many do most single-celled organisms have?
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Posted by: blausteinhhs | September 16, 2013

Brain Food: How to Eat Smart

Brain Food

What part of our body uses 20 percent of our daily calories? Yes, you guessed it (look at the above picture)…..the brain. Read the article at livescience.com to find out more about macromolecules (proteins, lipids and carbohydrates) and how they affect the body. Click here to read the article: live science.com

Answer the following questions in FULL sentences after reading the article:

1. Why is the brain such a picky eater?

2. What happens to your brain when glucose levels drop? What happens when glucose levels increase?

3. Name 1 food that causes blood sugar to decrease?

4. Explain the affect of white bread verses wheat bread to your body?

5. What is the key to a balanced diet?

6. Saturated fats are unhealthy, but why do you need fat in your diet?

Posted by: blausteinhhs | September 5, 2013

Could Humans Live Without Bacteria?

bacteria-100506-02

“The idea that trillions of bacteria are swarming over your skin and through your body is enough to give anyone the creepy crawlies….”

Read the article (Could Humans Live Without Bacteria?) by clicking the following link: live science.com

Answer the following questions in FULL sentences after reading the article:

1. Name 2 elements necessary for human life.

2. Name one major role of bacteria in both the soil and the ocean.

3. What role does bacteria play in creating amino acids and nucleic acids, which are the building blocks of DNA?

4. Name and Explain three ways bacteria can be helpful.

5. Explain how “good” bacterial can become harmful.

Posted by: blausteinhhs | September 3, 2011

A New Way to Think About Earth’s First Cells

Scientists have modeled what the first cells on Earth may have looked like and how they may have formed.  Read the article (A New Way To Think About Earth’s First Cells) AND watch the two videos on the right hand side of the page:  Click here for link.

Answer the following questions in FULL SENTENCES after reading the article and viewing the videos:

  1. Why did researchers at Harvard University model primitive cells in the laboratory?
  2. Where do scientists believe prebiotic molecules or protocells were formed before the origin of life?
  3. How are the tiny spheres of fatty acids (miscelles) arranged?
  4. Name 2 or more elements that make up hydrocarbon chains.
  5. What do the hydrocarbon chains eventually form (hint: type of macromolecule)?
  6. What do the fatty acids attach themselves to?
  7. What do fatty acids form when they attach together?
  8. What part of the “modern” cell is the spherical vesicle?
  9. Summarize the main reason the article was written or the main points of the article in three (or more) sentences.

Click on Leave a Comment.  Enter your answers (comments) in the Leave A Reply section. Lastly, POST Comment when you are finished.

Posted by: blausteinhhs | August 21, 2011

What do you know about the food you eat?

Go to the following website:  http://www.funtrivia.com/quizzes/sci__tech/biology/biochemistry.html

Important: Choose the fun trivia quizzes: Basic Biochemistry and Biochem Basics of Carbohydrates (make sure you choose the correct quizzes!)

Choose 5 questions from the two quizzes and explain in detail what you have learned (use full sentences). Do not just repeat the question/answer. For example, explain how the questions relate to what we are doing in class and add more meaningful information. 

Posted by: blausteinhhs | September 1, 2010

Biodiversity

Biodiversity: Why is it important?

Please read the following article and watch the movie clip on the following link:  Biodiversity: More than a list and stranger than Avatar

Next, answer the questions below.  You must answer the questions on this blog  by clicking on “Leave a Comment” tab  below and then submit your comments.

1. What do you think biodiversity means?

2. What is plankton?

3. What is the difference between zooplankton and phytoplankton? (hint: watch the movie clip on the website)

4. What do they use the plankton net for on the boat? (hint: watch the movie clip on the website)

5. Why do they use the filters?

6. What do you think the ocean water is clearer in Florida than in Massachusetts?

7. Why does the author compare biodiversity on earth to the movie Avatar? Explain in detail and give examples.

Posted by: blausteinhhs | February 7, 2010

The Genetic Factor

 

The Ulas family in Turkey has five adult members who walk on all fours. These handwalkers present a tantalizing enigma for geneticists.” Read the following article and complete the assignment below:  http://www.pbs.org/wgbh/nova/beta/evolution/genetic-factor.html

This assignment should entail significant time and effort by reading the article thoroughly and writing your own thoughts in detail about the following question:

Why do you think scientists believe that the reason adult members of the Ulas family walk on fours is related to both nature and nurture? Your should answer include scientific understandings of how apes evolved to walking upright.

Posted by: blausteinhhs | December 11, 2009

Cell Size and Scale

Scroll through the images.  Comment in detail about 5 of the pictures you see in terms of what you have learned in biology this year.  Likewise, comment on what surprised you about the size of the of the object or organism. You should have at least 2 sentences per image.

Posted by: blausteinhhs | August 26, 2009

Research Reveals Major Insight Into Evolution Of Life On Earth

Research Reveals Major Insight Into Evolution Of Life On Earth

Prokaryote

 

Scanning electron micrograph of a species of actinobacteria: Actinomyces israelii. (Credit: Courtesy of Wikipedia)

ScienceDaily (Aug. 20, 2009) — Humans might not be walking the face of the Earth were it not for the ancient fusing of two prokaryotes — tiny life forms that do not have a cellular nucleus. UCLA molecular biologist James A. Lake reports important new insights about prokaryotes and the evolution of life in the Aug. 20 advance online edition of the journal Nature.  READ ON 

Answer the following quesions in full sentences after reading the complete article:

Questions

1. What is the difference between a prokaryote and a eukaryote?
2. Are humans prokaryotes or eukaryotes?
3. Name 3 traits that developed from the fusing of genes between the two prokaryotes mentioned in the article.
4. Why do you think it was so important that these new prokaryotes could use the sunlight?  What is the name of this new prokaryote subgroup?

Posted by: blausteinhhs | August 26, 2009

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