Ms. Jones Science

Class Announcements

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

Octopus

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

They constantly amaze me.

"Bizarre" Octopuses Carry Coconuts as Instant Shelters (at National Geographic)

AP Biology Monday 11/28

posted Nov 28, 2011, 5:56 AM by Lena 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. https://docs.google.com/spreadsheet/viewform?formkey=dEhxZXR6V2Z6RmV4ZjlhLVl1U2RaVmc6MQ 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 Lena 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? 7.       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 Lena Jones

posted Sep 21, 2011, 11:00 AM by Lena 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 Lena 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.

posted Sep 7, 2011, 8:25 AM by Lena Jones

 http://baliga.systemsbiology.net/cytoscape/cellphone/help.php

Science Friday: Camoflage Win

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