Thursday- 09.30.10

Today we took notes on our new unit about cells and finished some of our microscope-cell lab.

Notes

Cell Theory
-all living things are composed of cells
-cells are the basic units of structure and function in living things
-new cells are produced from existing cells

Prokaryotes
-cells that have genetic material that is not contained in the nucleus
ex. bacteria

Eukaryotes
-contains a nucleus in which their genetic material is separated from the rest of the cell
ex. basically every other living thing

Animals cells have centrioles
Plant cells have a cell wall and chloroplasts
Both share many organelles such as a nucleus, cytoplasm, cell membrane, lysosomes, mitochondrion, golgi complex, endoplasmic reticulum, ribosomes, etc.

Microscope Lab:

Cell Structure and Function

For the lab titled Cell Structure and Function on pages 9-14 in our UP, we had to observe 4 different slides. The samples we observed were: an elodea leaf, a human cheek cell, an onion cell, and frog blood. We put drops of iodine, water, and methylene blue on the slides to help us see the details better. Some of the questions we were asked were:

What shape are the cells?

Do they all have the same shape?

How many cells did you see?

Is it prokaryotic or eukaryotic?

We also had to draw a picture and label the parts for each sample. This lab was a good activity to do because it gave us a better understanding of differences between cells.