New Unit

We made it through the cells, now we begin Heredity. We will begin with reproduction. I would like you to try to answer these questions to the best of your ability and we will discuss your answers in class tomorrow. You do not have to look these up, I want to know what you think they are.

1. What is reproduction?

2. What is asexual reproduction? ( Do you remember what the prefix a- means?)

3. What is sexual reproduction?

4. What kind of organisms can you think of that reproduces asexually? How about sexual reproduction?

5. What are chromosomes?

6. What are some advantages/disadvantages to asexual reproduction? 

7. What are some advantages/disadvantages to sexual reproduction?

Take a look at these pictures and tell me how you think they reproduce.  

Most missed quiz questions

To help prepare you for the test, we will be reviewing tomorrow.  After grading today's quiz, everyone should review the five stages of the cell cycle, don't confuse this with cell division.  The cell first undergoes three stages of interphase - G1, S, G2, next the cell undergoes cell division or mitosis(with its own stages), and lastly the cell completes cytokinesis. Remember the first three stages of the cell cycle are collectively called Interphase and the cell is not dividing, and mitosis has four of its own stages.

1. G1 phase
2. S phase
3. G2 phase
4. Mitosis
5. Cytokinesis

Stages of Mitosis

Hey guys and gals!  This is a tough chapter to get through but you will make it!)

Here is a pnuemonic device to help you remember the stages of mitosis: Please Meet Alli Today!!

1. Please, stands for prophase-chromsosomes condense, nuclear membrane dissolves, centrosomes move to opposite poles, and the spindle forms.
2. Meet, stands for metaphase-condensed chromosomes line up along the equator, spindle fibers link the chromatids of each chromosome to opposite poles
3. Alli, stands for anaphase-spindle fibers shorten pulling the chromatids toward the poles of the cells
4. Today, stands for telophase-nuclear envelope begins to form at each pole, spindle dissolves, chromosomes uncoil.

Take a look at the picture, which phase does this represent?
If you answered anaphase, you are correct!! Post your reasons why this picture depicts anaphase.

Project Reminder!!

Hello everyone, just a reminder about the cell project that is due next Monday.  The projects maybe anything you and your partners agree on. You can write a song/rap, story, paper; you can also create a gameboard, cartoon or anything else you can think of.  Rules to remember:

1. You must include all organelles and their functions
2. Cell diversity~Prokaryotes (single-celled organism, no nucleus or membrane-bound organelles)
                       ~Eukaryotes (made up of cells, has a nucleus, and membrane bound organelles)
3. No plagerism, cite your sources.

Check out these YouTube videos to get some ideas:

http://www.youtube.com/watch?v=r7TJqPIzxSw&feature=related

http://www.youtube.com/watch?v=IYe5tHaEXRE

Introduction to Cells

Hello class! Monday we will begin our unit on cells.  I would like you to get started by taking a look at cell structures.  Here is a great website to get you started:

http://www.tvdsb.on.ca/WESTMIN/science/sbi3a1/Cells/cells.htm


This is an interactive site to help you begin to know some terminology associated with cell structures.  Please be prepared by knowing these terms:
1. Mitochondrion
2. Golgi apparatus
3. Endoplasmic reticulum ~ two types
4. Vesicle
5. Nucleus
6. Vacuole
7. Chromatin
8. Lysosome
9. Ribosomes
10. Centriole

There is a difference from the cell on the left and the cell on the right. How do they differ? What major difference can you describe?