Scribe Post 2/9/11

Announcements: The Evolution Test Is On FRIDAY!! and Tomorrow is a Bio Day in the Lyceum.

Homework: STUDY FOR THE TEST!! Finish up Lab 40 from the lab book. The Objectives on page 1 in the UP are extra credit. The TV ad project has been moved back, it is now due on Tuesday, March 1st.

Today: In class today Mr. Paek gave us some more things that we needed to study.

• We should know UP 33-36 and how to read the graphs on those pages, along with knowing about natural selection, the time eras and the Neanderthals.

• After this, we took a practice quiz with Mr. Paek to get an idea on how well we are prepared for the test. Then he answered any last minute questions we had. Don't worry though, it was a class quiz and it wasn't for any credit.

• Then, we started lab 40, which involved measuring the lengths of dead grasshoppers femur bones so that we could observe variations in a species. Then we shared our class information and made a graph and finished the lab.

• Remember to study for the test and that tomorrow is a Bio Day! Thats what we did today in class.

• Tomorrows scriber is Will!!

Scribe Post 2/8/11

Announcements: Evolution test is on Friday! Thursday is a bio day.

Homework:*TV ad due Feb. 28th

*Finish evolutionary changes in primates lab (UP

42-47)

*Read 26.3 for Wednesday.

Today in Class:

-First we took notes in our notes packet under V. HUMAN EVOLUTION

Notes: *First Humans

-Ape-Human split- 5-7 million years ago.

- Australopithecus "Lucy" - 4.0 mya.

-Homo Habilis- "handy man"

-Homo Erectus first to migrate (1.8mya)

-Homo Sapiens (200,000 mya) including neanderthal man.

* Primates

-Binocular vision (3D)

-Flexible forelimbs and shoulders

-Problem solving ability

After we took notes we did another lab on pages 42-47.

-Using the pictures on page 43 and 46, answer the questions on page 45 by measuring with a protracter and a ruler. All the directions are stated on page 42. After, answer

the analysis questions on page 47.

*Next scriber will be Nick Burke*

Scribe Post 2/7/11

Announcements: Make sure you know Darwin and the natural selection, and the survival of the fittest well for the test on Friday.

Homework:- TV ad due on 2/28

- finish lab questions on UP page 32

- answer questions 6-7 on UP page 30

Today we took notes from our To Be Or Not To Be note packet and we did a lab.

Notes:

Types of Evolution:

1. Microevolution- changes that take place within a single species to form variations in a population (small changes)

Genetic drift- changes in a gene pool of a small population due to chance (usually reproduces genetic variability)

2. Macroevolution - changes that have taken place in a species that leads to two or more different species

Lab:

In order to do the lab we first had to know what a half-life was. A half-life is how long it takes for half of something to disappear.

In this lab we started off with 100 M&M's.

• We first had to put the M&M's in a cup and shake the cup for a half-life, which in this case, was 10 seconds.
• Next we had to pour theM&M's onto the plate and spread them out. The ones that showed the m were the ones that were considered to be decaying and the ones that were face down, were fine.
• We would then remove the decay and repeat this process with the remaining M&M's and an increasing half-life time.

*Danielle will be the scriber for tomorrow*

Scribepost Friday 2.4.11

Announcements: **Extra credit pages 24-25 in UP, bring in M&Ms (all due Monday), Objectives due Friday

Homework: UP 33-36 due Monday, 19.2 (reading only) due Tuesday

Today we took notes most of class, from our To Be Or Not To Be note packet. These are the notes we took:

1. ANCIENT EARTH

1. Atmospheric Condition

1.Gases

Carbon Oxide, Nitrogen, water vapor (notice no oxygen)

2. Miller-Urey Experiment- Synthesized complex organic molecules by mixing and electrically stimulating a mixture of gases

1. The first cells-

4.6 bya- Earth was born

4.0 bya- Earth began to cool

3.5 bya- bacteria

1.3 bya- multicellular organism

1. Age of Earth

a.Formation of Earth

4.5 billion years ago

b. Relative Dating (UP23)

geologic time scale/ deeper layers are older than surface layers

(skip to IV.)

1. TYPES OF MACROEVOLUTION

1.Gradualism

one species gradually changes into a new species

2. Divergent Evolution or Speciation

a. Definition- development of 2 or more species from a common ancestor

Adaptive Radiation- a habitat opens up that permits many new niches to be occupied allowing many variations to survive

b. Process that needs to occur:

Graphic Isolation- members of species separated

Reproductive Isolation- species that are separated by ability to reproduce

3. Punctuated Equilibrium- Tempo of speciation: gradual vs. divergence in rapid bursts; helped explain the non-gradual appearance of species

Convergent Evolution-

a. definition- when 2 separate species develop similar adaptations through different evolutionary trees

b.examples- sharks and dolphins (mimicry)

After taking notes, Mr. Paek let us start our homework.

***Next poster will be Star.***

Scribe Post for January 27th, 2011

Date- January 27th, 2011




Announcements- Tommorrow, Friday, January 28th, 2011, we have a bio day that is located in the auditorium. Go straight to the auditorium during period 8.




In Class- We did a lab in class on natuaral selection. It can be found on pages 17-19 in your green unit packet. The procedure for this lab went as follows:

• You would spread a piece of fabric out on the table.
• Grab 10 different colors of paper, and hole punch each color 10 times and put them on the cloth, so you have a total of 100.
• 2 members of the group would act as "predators," which means that they would pick 40 pieces of paper each, but turning away after each pick and picking the 1st color that they saw with no hesitation.
• Collect the 20 remaining pieces on the cloth and record the number of each color remaining on the data table on page 18.
• Add 4 chips of the same color for every chip that remains from the original population, now the total should be 100 again.
• Repeat the picking procedure for the second and third generations and record your data in the same place.

Purpose- The most important thing when doing these labs is to understand why they are being done. The purpose of this lab is to learn how natural selection works. And to also reinforce your concept of to how natural selection works with a demonstration.

NATURAL SELECTION: The process by which organisms with variations most suited to their local environment survive and leave more offspring. It occurs in any situation when more individuals are born than can survive, there is heritable variation, and variable fitness among individuals.

(Those terms and definitions can be forund in your textbook, Ch. 16, section 3.)

NEXT SCRIBER: Sammie

Scribepost 1/27/11

Date...1.27.11



Announcments...nothing interesting that anybody needs to know about.




Homework...read 16.2 and 16.3 and take notes on 16.3, also finish the lab about bird beaks we started in class and do the graph




In class...we began the lab on page 4 of the unipacket. the lab was about the evolution of bird's beaks for whatever food source they have. We were split into our new lab groups and we began the experiments with the 4 different types of "beaks," forceps, a large spoon, a staple remover, and pliers were supposed to represent beaks. In the lab there were 5 different experiments, one where we had to remove styrofoam peices from a tub, one were we had to pick out single grains of rice from a log, one were we had to remove staples from a paper rabbit, one were we had to pick rubberband out of a box with a lot of shredded paper init, and one were we had to not only pick up sunflower seeds but also crack them with our "beak."


The next scriber will be...Jake J

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.