jueves, 19 de febrero de 2009


This is an example of a plant cell.
A plant cell is a cell that is a unit of a plant.

The plant cell has: a cell wall, cell membrane , vacuole, nucleus, cytoplasm, ribosomes, golgi body, rough and smooth endoplasmic reticulum, and a mitochondria.
Images: fhttp://www.enchantedlearning.com/subjects/plants/cell/anatomy.GIF

jueves, 5 de febrero de 2009



This is an animal cell.
Cell: smallest unit of an organism that can carry on life functions. the animal cell has a cell membrane, cytoplasm, nucleus, nucleolus, mitochondria, golgi body, lysosome, ribosomes, rough end. reticulum and smooth end. reticulum.
Def. of animal cell:
A cell that is a unit of an animal.
The differences between a animal and a plant cell are:
1. plant cells have a cell wall and animal cells don't.
2. plant cells have a chloroplast, where they contain chlorophyll but animal cells don't have.
3. plant cells have a big vacuole, but animal cells have a small one.
4. plant cells are more rigid than animal cells, thanks to the cell wall.
Image:
http://www.enchantedlearning.com/subjects/animals/cell/anatomy.GIF



Meiosis is a process of reductional division in which the number of chromosomes per cell is cut in half. Meiosis begins with Interphase I. During Prophase 1, the chromatid pairs are now visible and the spindle is beggining to form. In Metaphase I, the chromatid pairs line up in the center of the cell. of the cell. Anaphase is when the chromosomes have separeted.In Cytokinesis I, the cells finally split, with one copy of each chromosome in each one. Interkinesis has not replication, unlike the previous Interphase I and the interphase of mitosis.Prophase II, Metaphase II, Anaphase II, and Telophase 2 repeats the same steps as Prophase I-Telophase I, with half as much genetic material. Cytokinesis 2 is the final step of meiosis, where each cell splits into two daughter cells. That is the process of meiosis!

jueves, 29 de enero de 2009










Mitosis process:
Interphase- during interphase, the cell's chromosomes duplicate. The nucleolus is clearly visible in the nucleus.

prophase-the chromatid pairs are now visible and the spindle is begginning to form.
metaphase-chromatid pairs are lined up in the center of the cell.
anaphase-the chromosomes have separated.
telophase-the final step, the cytoplasm is beginning to separate.
Images:http://www.biologycorner.com/resources/interphase.jpg

jueves, 22 de enero de 2009












Mitosis is the process of formation of two cells with identical nucleus.
Mitosis happens thanks to chromosomes!
I hope you will learn about mitosis!!



The 2 images found from: http://www.poster.net/mitosis/mitosis-mitosis-9912414.jpg http://training.seer.cancer.gov/module_anatomy/images/illu_cell_division.jpg