HOMEWORK: read chapter 3 in unit 18 (taking notes is recommended)

ANNOUNCEMENTS: The new unit packet is out! There also is a project due next week on Tuesday. You can find the project on page 3-4 in the unit packet.

*The Endangered Species Commercial is due in two weeks (Tuesday)

In other news, today I successfully ate some fried chicken throughout the span of class without Mr. Paek noticing (or, at least, caring enough to take away). It was a successful day.

There will be a lab on thu. and fri. featuring leeches so prepare yourself!

Animal of The Day: (a new daily thing) the animal of the day today is the Hag-fish.

type: agnatha, jawless fish

other features: the fish, when disturbed, sprays a slime which reacts with water, hardening into a jell-like substance. It's pretty cool, you can check out the Hag-fish in action at:http://www.youtube.com/watch?v=Bb2EOP3ohnE

notes: Taxonomy-def.: naming and classifying

Taxonomy groups:

-Kingdom: broadest grouping

-phylum

-class

-order

-family

-genus

-species: most specific

(those are groupings based on similarities of animals like: vertebrate vs. invertebrate, type of animal, ancestors, etc.)

"KPCOFGS" (Koo-pa-ka-fo-gus) is one way Mr. Paek remembers the order of the taxonomy groups in order of broadest to most specific.

Evolutionary relationships: based on biochemical similarities.

Binomial Nomenclature def.: 2 names comprised of genus and species.

Ex: Homo sapien (must be italicized, second word is lowercase)

Kingdoms:

-archaebacteria- comprised of prokaryotic cells

-protista- comprised of unicellular eukaryotic, heteretrophic, or autotrophic organisms.

-fungi- comprised of multicellular, eukaryotic organisms (like mushrooms and yeast)

-plantae- comprised of plants

-animalia- comprised of animals

-eubacteria- comprised of single cell organisms

And finally we ended the day with a movie about large bugs, we ended at a part where the host was trying to prove that there were very large dragon flies at one point but they died of leaving only the smaller ones. he did this by trying to prove that the large flies were not used to the sudden decrease in percentage of air in the atmosphere (thanks to developing fungi which released more carbon dioxide into the atmosphere) and therefore died of from not having enough energy to gather food and reproduce, thus, leaving the smaller dragon flies to survive (assuming, that's where he was going with his study).

And that was bio for Feb. 14th 2011 (and i apologize for any misspellings)!

Oh and before i forget, the next scriber will be Su.

Scribepost Jan. 25 2011

Announcements: All homework assignments and unit calendars will be posted on moodle.

Homework:  Read chapter 16.2 (no notes required) and chapter 16.3 notes.  Both will be checked in on thursday.

What we did in class:  Today in class we took notes from Mr. Paek's lecture about Darwin vs. Lamark. Also we got the unit packet for the new unit(Evolution 101) which took up most of class.  Then we ended class with watching more of the Charles Darwin movie for the last 10 minutes of class.  

Lamark:  Had three main theories on evolution.

1. The Desire to Change-  animals and organisms change in structure because of a desire to improve.  An example is that a giraffe's neck got longer because they stretched to get leave at the top of branches.
2. Use and Disuse-  use it or lose it.  If decided not to use then something would be lost over time.  Mr. Paek described this by saying if he didn't like his thumb and decide to wrap it up and not use it for the rest of his life, it would lose muscle.  Now becoming factor of his offspring.
3. Acquired characteristics were inherited-  Any changes in the adult were passed on to the offspring.  Example is the stretched giraffe necks were now inherited by the young.

While talking discussing this Mr. Paek said based on Lamark's theories, if he wanted his son to be really strong he could start working out really often so he becomes really strong.  Then have a child that way his son has a better chance of being strong.  Then he thought of this video and showed it to us.  

http://www.youtube.com/watch?v=T-CMrswt_1A

Darwin:  Came up with five theories of evolution of his own too.

1. Overproduction of Offspring-  Organisms tend to produce more offspring then needed to replace numbers.
2. Struggle for Existence-  Competition for resources and predation are always present. The example used in class was that Mr. Paek would tell us only 1 person would get an A second semester and the rest would get either a C or F.  So, then we would all be more competitive to get that one spot for the A.
3. Variations in Populations exist-  Differences in structure exist at birth not acquired.  These variations are inherited from the parents.
4. Fitness-  Organism must have a physical trait or behavior so they can survive and reproduce. 
5. Common Descent-  Some species share a common ancestor.

Natural Selection:  The organism that are best suited for the present environment conditions will survive to produce therefore passing on their characteristics to their offspring. (Survival of the fittest)

• Conditions that help-  Mutations are a source of variation in genes. Also, gene flow when genes are moving between populations.
• Adaptations-  Traits that survive from one generation to the next.

That was it for today, the next scriber will be Donnie.

Scibeost 11/30/10

Homework:

Packet pages 30 and 31

Today in class we talked about Meiosis. Meiosis is the process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. Meiosis looks like this

Today in c;ass we also talked about Genetics. we went over some word like:

Allele- which is a form of a gene represented by a single letter(ie: a, A)

Homozygous-a homozygous has to like genes for a given trait, AA, BB, zz, dd.

Phenotype-the result of a genotype in regards to it's function or appearance. What a thing looks like (its traits).

Genotype-Genes that give a phenotype.

We talked about Gregor Mendel. He was the founder of genetics and also created the Punnentt Square.(below)

11/1/10 Blog

Hellooo period 8 Bio-ers! Here is a recap on what happened today.

1) Mr. Paek talked about a new project: A post card to sent to your technology hating grandma Gurtrude about a new virus epidemic (you choose what one) and send a post card telling her how to prevent it. Look on UP page 2 for more information.

2)We finished the bacteria lab that we started last Friday by checking the petri dishes and seeing the growth of the bacteria that grew. According to some people, it smelled bad....but whatever. Then you finished the remaining questions about the lab.

3)Third and Finally, we watched a BILL NYE THE SCIENCE GUYY video about bacteria.

Annddddd thats about it!

REMEMBER: THE POST CARD IS DUE NEXT MONDAY!
HOMEWORK: 35.2 NOTES!

Scribe Post

Today we went over greenhouse gasses and the human affect on the atmosphere. We learned that the burning of hydrocarbons(fossil fuels, or gas) and the desruction of rainforests are the biggest contributers to global warming.

The greenhouse affect is shown in the picture above. The greenhouse affect happens when there is too much CO2 in the atmoshphere and the sunlight that usually ecapes the atmoshphere stays in the earth heating up the planet.

This causes the melting of the polar ice caps and flooding of lower regions.

HOMEWORK: FINISH OIL SPILL MOVIE DUE TOMOROW!!!