Scribe

2nd Semester just started and we are starting a unit on EVOLUTION.

Homework is to Read 16.1-16.3 (pgs. 450-464) and do a double bubble "Darwin vs. Lamark". Also visit Mrs. Stein for a homework pass but read the reflection questions she posted first so you know what to talk about.

We went over things we knew about Evolution and made this list:

-Time of Change

-Adaptation to enviroment

-Changes/Transformation

-"Apes turn into People" --> False

-How Humanity got to where it is today

-Pangea --> landmass of all the continents

-Charles Darwin

-"Proved" --> it is a theory, cannot be proved

-Galapagos- origin of understanding of evolution

-migration

-SURVIVAL OF THE FITTEST

Evolution: Change in a species over time

EVERYTHING SHARES A COMMON ANCESTOR!

In class we started watching a video on Darwins voyage to the Galapagos Islands which are the tips of volcanos coming through the water.

We had four questions to answer.

What did Darwin observe on his voyage?

-In 1822 darwin went to the Galapagos for 20 years.

-He came to the conclusion that living things are shaped by the world around them.

-He saw Giant Turltes, Hummingbirds, Plants, Iguanas, Finches, and many more.

-He noticed that the same animals on each of the different islands which are pretty close together have different fundamental characteristics; Turtles had different shaped shells, birds had different beaks and colors.

What is Natural Selection?

-The process that animals are able to adapt and have different abilities and characteristics which suit them better for their environment.

How did the story of the Finches Beaks illustrate Natural Selection?

-It showed how each Finch from a different island had different beaks specifically for their island. some had beaks to dig better, crack nuts better, eat certain foods better.

It shows how they adapted to perform better in the places they are in most.

How did iguanas illustrate Natural Selection?

We did not finish the video so we will continue it tommorow. I am guessing iguanas adapted their skin colors.

JACK WILL BE OUR NEXT SCRIBE!!!

Hemophilia

Hemophilia is a Sex-Linked bleeding disorder that slows blood clotting. It can cause people to bleed more often from little injuries and bleed alot longer from things such as surgery, any injury, or having a tooth pulled. Hemophilia can cause severe internal bleeding into joints, muscles, organs, or the brain. It can cause massive swelling and even death.

Hemophilia A is caused my a change in the F8 gene and Hemophilia B is caused by a mutation in the F9 gene. A is the classic one while B is known as christmas disease. A form of B is known as hemophilia B Leyden and that causes excessive bleeding in adulthood but gets better after puberty. Hemophila C is the rarest and takes much longer to clot.

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The symptoms are simply bleeding. They may not be noticed until later in life during surgery or after trauma. Diagnostics and Detection are normally after a severe bleeding episode.

People can be treated by receiving the clotting factor by intravenous infusions which is through a vein.

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Hemophilia is more common in men. 1 in 400 to 1 in 5000 males are born with Hemophilia A and 1 in 20,000 are born with Hemophilia B worldwide. it affects all ethnic groups.

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Life expectancy isnt really affected but some may bleed to death and internal bleeding may cause problems.

HIV cured

A 45 year old man from germany aquired HIV in 1995 and he also had Leumekia. In 2007 he recieved a bone marrow stem cell transplant from a donor who was immune to HIV. About 1% of caucacasians are immune to HIV. The possible cause of the immunity came from the people who survived the plague and passed it down through genes. The day he got the transplant he stopped taking his medication for HIV and he hasn't taken it since. He is cured! It has do do with white blood ceels being uninfected and transplanted, then they become the immune system. This cure is complicated because of the difficulty finding a donor match and doing the transplant. They will test this solution much more soon.

for a more detailed story..... http://sanfrancisco.cbslocal.com/2011/05/16/apparent-immunity-gene-cures-bay-area-man-of-aids/

Unit one

I thought unit 1 was good. it helped us learn to do labs and use the equipment and fill out questions about the labs we did. unit one was really easy because my entire group had everything ready for the days we had the labs. Using the microscope to see the microscopic specimens was pretty cool. i missed out on the ink feeding lab but i did see the living tetrahymena the day before when we had extra time. the rest of bio seems like it will be alright and kinda interesting so it wont be too bad.

gliese 581g

After 11 years of NASA research a red dwarf star, gliese 581g has been looked at a lot closer and it is pretty much another Earth. After looking at pictures of it I thought it was just a picture of Earth but it's not.
This planet is not freezing like all the planets past mars that range from -200 through -400 degrees. And it is not hot like Venus and Mercury that are in the 800's.
It has been said that Mars has dry river beds and other dried up bodies of water which once supported life. The only water on Mars is frozen from the cold which at its lowest is -190 degrees.

On gliese 581g an atmosphere is capable of being held because the gravity is strong enough, but the star that would be this planets "Sun" does not get circled like Earth does to the Sun. Because of that, the lighted side of this planet will always be the lighted side and the dark side will stay dark. If we were to live on this planet we would have to be on the border so we don't freeze or burn but stay at a decent temperature.

Here's a more detailed article from NASA about this http://www.nasa.gov/topics/universe/features/gliese_581_feature.html
This could be interesting if we lived there but it is 20 light years away. so if we traveled at the speed of light for 20 years then there we go.


I'm excited about...
Passing this class and getting it over with.

I'm not excited about...
Having to do work.