Class Announcements

For daily information, click on the class title to the left.  For entertaining science links, go here.


posted Jan 8, 2012, 3:58 PM by L Jones

They constantly amaze me.

AP Biology Monday 11/28

posted Nov 28, 2011, 5:56 AM by L Jones   [ updated Nov 29, 2011, 8:18 AM ]

Ms. Jones home with sick baby.

Pick up:
  • Prelab Lab 1 (DUE TOMORROW): Don't do part C (you don't have the data) but use the online lab to work through the parts of the lab.  We are doing a very similar but slightly different setup.  You will not be doing all the math until after you have completed the labs.
  • "Osmosis Through a Membrane" (have in lab book, you will set up day 1 tomorrow
  • "Diffusion Through a Membrane" (have in lab book, you will set up day 1 tomorrow)
In Class Today, answer the questions about Chapter 7, Cell Membrane.

This week:
  • Monday: today
  • Tuesday: Set up Day 1 of Part A and Day 1 of Part B
  • Wednesday: Collect Data, Day 2 of Part A, Day 2 of Part B
  • Thursday: Part C and Set up Part D
  • Friday: Collect Data, Part D
Reminder Due Tomorrow:
  • Evaluation of Cell Respiration and/or Photosynthesis Models
  • Formal Lab 4 Write up

Why Don't Cells Grow Indefinitely?

posted Oct 24, 2011, 8:31 AM by L Jones

Analysis Questions:


1.     Anything that the cell takes in, such as oxygen of food, or lets out, such as carbon dioxide, must pass through the cell membrane.  Which of the measurements of your model cells best represents the surface area of the cell membrane?

2.     The cell contents, including the nucleus and the cytoplasm, use food and oxygen and produce wastes.  Which two measurements best represent the contents of one of your model cells?

3.     As the cell grows larger and accumulates more contents, will it need more or less cell membrane to survive?  Explain your answer.

4.     As a cell grows larger, does the surface area-to-volume ratio get larger, get smaller, or remain the same?

5.     As a cell grows larger, what happens to the surface area-to-mass ratio?

6.     Which cell model has the greatest surface area-to-volume and surface area –to-mass ratio?


a.     Why can cells not survive when the surface area-to-volume ratio and surface-area-to-mass ratio become too small?

b.    Which cell model then has the greatest chance of survival?

8.     How many cells with s=1 would fit into a cell with s=2?

9.     Which as more total surface area, one cell with s=3… or 27 cells, each with s=1?

10.  How can the surface area-to-volume and surface area-to-mass ratios be increased in a large cell?

11.  As the length of a side doubles in a cell, what happens to the distance that nutrients must travel to reach the center of the cell?

12.  Was your hypothesis supported by your data?  Why or why not?

Link for entering Mello Jello Data

posted Oct 18, 2011, 7:27 AM by L Jones

Link for Entering Your Halo Data

posted Sep 21, 2011, 11:00 AM by L Jones   [ updated Sep 21, 2011, 11:12 AM ]

Check on the current class data here.

Dear General Biology:

posted Sep 17, 2011, 4:40 PM by L Jones

Pick some sort of "abiotic factor" that affects life.  Wind, something in the water, a nutrient, amount of light, pH, whatever you want.  Design an experiment to see how it affects the growth of Halobacteria.

Science Friday: Camoflage Win

posted Aug 12, 2011, 8:45 AM by L Jones   [ updated Aug 12, 2011, 8:47 AM ]

Timeline Sign Up

posted May 2, 2011, 9:47 AM by L Jones   [ updated May 4, 2011, 5:17 PM ]

 Link to the form to sign up for your topic:


Link to see what others have signed up for:




How about you search for one of these lovelies:

  • Cnidaria
  • Porifera
  • Mollusca
  • Brachiopoda
  • Arthropoda
  • Echniodermata
  • Annelida
  • Hemichordata
Good times in the Precambrian and early Paleozoic!

Answers to the "Super Secret Surprising Startling and Snazzy Chapter 8 Quiz"

posted Apr 1, 2011, 9:41 AM by L Jones   [ updated Apr 1, 2011, 11:24 AM ]

1. a. DNA has ATCG, RNA has AUCG
b. DNA: deoxyribose; RNA: ribose
c. DNA: double stranded; RNA: single stranded
2. 2 identical strands of DNA
3. Nucleus
4. RNA
5. Nucleus
6. Polypeptide (protein)
7. Cytoplasm
8. a. Phosphate
     b. Nitrogen-Containing base
     c. Sugar
9. a. mRNA: sends message to be translated
     b. tRNA: brings amino acids to ribosome
     c. rRNA: forms ribosome
10. a. amino acid
        b. anti-codon
11. Peptide
12. Sequence of 3 nucleotides that code for a peptide
13. Mutation of just one nucleotide
14. A T G C C C C G C T G A T T
15. A U G C C C C G C U G A U U
16. met    pro    ala    stop
        UAC GGG  GCG  ACU
17. Circle around "AUG"
18. Square around "UGA"

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