Scribe Post 5/7

Hi Class!!!

In class today we-

• Collected lab 55 (frog lab)
•  Stamp nutrient pre-lab
• Went over class data from calorimetry lab
• went over nutrient lab pre-lab 
• Practice quiz

Homework-

• Design a quiz due TOMORROW!
• Finish calorimetry lab 
• Test Thursday, Study!!!

*** Just a reminder about the design a quiz! It should be 20 questions. the 

questions should be thought provoking and at an honors course level. Make sure that you use variations of questions like fill in the blank, multiple choice, and matching. Add at least one diagram in it. 


For a long time in class today we reviewed the calorimetry lab. Everyone was a little bit confused of how to find answers to how find energy content in a food. 


Remember these things, the basic formula for solving the energy content in a food is

Energy content of food = Energy gained by water / The change in the mass of food 

Before you can do that formula, you have to be able to find the energy gained by water. This is the formula for how to solve it.

Energy gained by water = (mass of water) x (Changet of water) x (4.18 J/g C)


Before you can calculate the energy of your food you have to divide your answer by 100. this is because it is in joules and needs to be converted into kilojoules.


Practice that and make sure you know how to do it because you need to understand it for the test!

Next we went over the pre-lab for the nutrient lab!

We will be testing foods for protein, simple sugars, starch, and lipids

We will do these by a variety of tests.. these test are.......

Iodine Test-
Tests for starch. this test is when you use Lugol's iodine solution. this yellow-brown solution will mix with the food. if there is starch present it will turn blue-black in color.  

Benedict's Test - 
Tests for simple sugars. It is blue in color, but when there is sugar it will change to green yellow or brick red.


Biuret Test-
Tests for proteins. When you add the solutions to food and stir, the mixture will either stay blue for negative results or turn pink-purple for positive results. 


Brown Paper Bag Test- (sounds dangerous)
Basically you leave your food on the brown paper bag and if it leaves an oily smeary translucent smear it is positive for lipids. If it does not, then it is negative..


Also remember to bring your own food to test!


Have a good night!


NEXT SCRIBE- JEREMY FINE





 

Scribe Post: 2/14

Hello my fabulous bio class and visitors,

Happy Valentines Day! :)

Today in class we:

• Discussed our upcoming unit
• Went over details for the nature magazine cover/article (UP page 5-6A)
  
• Classification notes
• Shark lab (UP Page 11-14)
  

Homework:

• UP page 7-10
• UP page 11-14 ( Shark lab )

Tomorrow:

• Fungus & animal notes
• Lab # 44
• GET PUMPED!!

For you sleepyheads, we are in a new unit! It is called "The diversity of Life"...

We have an upcoming project due 3/2 not 3/4!!! It is a nature magazine cover and article on your choice of invertebrate. You have to digitally create a cover and and article in collumns with pictures and in-text citations!

NOTES: Classifying the Diversity of Life

Some basic definitions you need to know!

• systematics- reconstructing evolutionary history by studying biological diversity from the past and the present.
• taxonomy- the identification, naming, and classification of species. They do this because they want to put things in order so animals make sense how we are related.

• Carolus Linneaus- He lived from 1707 to 1778. He was a physician and a botanist. Themost important thing he did was started a two part name for each species!
  

• He named it Binomean nomeclature. This means 2 name-naming system. He used latin in his name because it is the root of all languages.

• His system has a hierachial classification of species into broader and broader groups of organisms.
• Kingdom, phylum, class, order, family, genus, and species. This could also be known as KPCOFGS. A way to remember that is King pelican comes over for good sprouts.

• In the past, species of animals where grouped by their physical apperance, which could prove to not be so true.

The Cladistic Revolution

• Since we have computer technology and DNA we have a new and better way of classifying species
• Cladistic anaylasis- scientific search for clades, or branches, which consist of a common ancestor and every descendant that came from it.
• Phylogeny- the evolutionary history of a group or species
• Cladistic anylasis is the most widely used method in systematics.

• Cladistic anaylasis has proved many previous thoughts wrong, for example birds and reptiles are now in the same class.

Here is an exampe of cladistic analysis chart.

• They used to use the 5 Kingdom Classification System this is the OLD WAY!!!
  
• This was thought of in 1969 by Robert H. Wittaker
• It was split into 5 kingdoms, animalia, fungi, plantae, protista, and monera.
• We now have six kingdoms, we split monera.

Now we have 3 Domains

This is an alternative to the five kingdom system

• The 3 domains are bacteria, archaea, and eukarya.
  
• Bacteria and archaea are prokaryotes, and eukarya is from eukaryotes.
  

Taxonomic Key

• Always start at the top of the key.
• Use a taxonomic key!
• Dichotomomous key- 2 opposing staments at one time

Thats about all we did for notes, the last couple minutes we worked on our homework and the shark lab!!!

If you want full notes then check on moodle!!!!

Have a great night guys,

Minji

NEXT SCRIBE: Will