Science. Practice EOC Exam from NC. Georgetown High School: Teachers - Hank Wortley - Links. BIOLOGY with Mr. Norland. Kimball's Biology Pages. Ways to Search These Pages Search Engine.
Enter desired term(s) in box above right and click on "GO". (Advantage: finds all occurrences; disadvantages: may return trivial hits, your choice of term may not match mine). Suggestion: Click on search tips link to help you get the most useful results. Link To Individual Index PagesA-B-C-D-E-F-G-H-I-J-K-L-M-N-O-P-Q-R-S-T-U-V-W-X-Y-Z either here or at the top of each index page and then scroll down to your desired term or enter the term in the "Find" function of your browser. About These Pages The pages represent an online biology textbook. It has always seemed to me that the many parts that make up the subject of biology are related to each other more like the nodes of a web than as a linear collection of independent topics.
Another disadvantage of printed textbooks is the inevitable delay between the time that new advances in biology are reported and the time that they can become incorporated in a printed book (often several years). John W. CELLS alive! Concepts in Biochemistry - Interactive Animations. Interactive Mitosis. This animation demonstrates the stages of mitosis in an animal cell.
Use the control buttons along the bottom to run the complete animation. Click on any intermediate stage (for example, Anaphase), and see a representative still frame. Interphase: Cells may appear inactive during this stage, but they are quite the opposite. This is the longest period of the complete cell cycle during which DNA replicates, the centrioles divide, and proteins are actively produced. For a complete description of the events during Interphase, read about the Cell Cycle. Prophase: During this first mitotic stage, the nucleolus fades and chromatin (replicated DNA and associated proteins) condenses into chromosomes.
Prometaphase: In this stage the nuclear envelope breaks down so there is no longer a recognizable nucleus. Metaphase: Tension applied by the spindle fibers aligns all chromosomes in one plane at the center of the cell. Cancer cells reproduce relatively quickly in culture. Interactive Cell Cycle. During development from stem to fully differentiated, cells in the body alternately divide (mitosis) and "appear" to be resting (interphase).
This sequence of activities exhibited by cells is called the cell cycle. Follow the events in the entire cell cycle with the following animation. Interphase: Interphase, which appears to the eye to be a resting stage between cell divisions, is actually a period of diverse activities. Those interphase activities are indispensible in making the next mitosis possible. Interphase generally lasts at least 12 to 24 hours in mammalian tissue. Gap 0 (G0): There are times when a cell will leave the cycle and quit dividing. Gap 1 (G1): Cells increase in size in Gap 1, produce RNA and synthesize protein. S Phase: To produce two similar daughter cells, the complete DNA instructions in the cell must be duplicated.
Copy of AP Bio- Metabolism 3: Photoautotrophic Nutrition by Hank Wortley on Prezi. Copy of AP Bio- Metabolism 2: Chemoheterotrophic Nutrition by Hank Wortley on Prezi. MH02 Photosynthesis Animation. MGH Biology Animation. Process_diagram_cellular_respiration. Georgetown High School: Teachers - Hank Wortley - Power Points for Biology.