G2 phase: Synthesis of cell machinery in prepara-tion for cell division. B. Mitosis (M) phase: The division of genetic material and cellular contents. The stages of mitosis 1. Prophase: Replicated chromosomes condense. Spindle forms along cell equator. Nuclear envelope breaks down; spindle microtubules en-ter nuclear region‚ eventually attaching to cen-tromeres of chromosomes
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Week 3 Mitosis and Meiosis Assignment William Scalia Grantham University Week 3 Mitosis and Meiosis Assignment A rare disease that is inherited is Tay-Sachs disease. What the disease does is it destroys nerve cells located in the Spinal cord and the brain. The most common type of Tay-Sachs appears in infants. The disease is present early in development but the symptoms usually don’t appear until after the age of 4. Symptoms appear as a slowing or halting of development to include
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structures in the cytoplasm of a cell that contains digestive enzymes to digest and destroy old cells‚ bacteria‚ and foreign matter. 14. Mitosis- The process of cell division that occurs in gametes‚ or sex cells/ ovum and spermatozoal *15. Mitochondria- Those structures in a cell that produce energy and are involved in the metabolism of the cell. 16. Mitosis- Process of asexual reproduction by which cells divide into two identical cells. 17. Muscle Tissue- Body tissue composed of fibers that produce
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Can you imaging everyone’s appearance is the combination of all his ancestors but not exactly the same? The video “Life’s Greatest Miracle” tells you why and how did that happen when you are just a single cell at the very beginning. The attractive video brings me to a physiological world. First‚ I am surprised by the amount of sperms that a man could produce. Thousands of them are made every second‚ a hundred million in a day‚ and trillions over a lifetime. This is an amazing ability and opportunity
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surface area compared to volume‚ such as the biggest cube‚ then there would be hardly any surface area to exchange materials through substances. Another reason why cell division might take place is due to the increase in surface area of volume ratio. Mitosis helps the cell by keeping it in the original size and ensuring that diffusion is performed easily and thus resulting in the cell working
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let us know the vinegar have reach a point of neutralization once the vinegar turns pink. We can then calculate the concentration of acetic acid in the vinegar. Procedure: Data: Set up the lab: Take a tick text book and place it on top of the labpaq box to use as a titrator holder. Slip the clamp into the textbook by placing the test tube clamp into the middle of the book. The stop cock tip should be 1-2 cm above the beaker. Use the test tube holder to clamp the 10 mL syringe with an affixed
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Feb. 10/13 Lab 7 Diversity of Photosynthetic Organisms Observation of marine and fresh water algae Identification of lichens Study of leaf tissue cells Quiz next week. Feb. 17 President’s Day Feb. 20 Lab 5 The Cell Cycle: Mitosis – simple cell division Meiosis – formation of reproductive cells. Individual labeled diagrams due at end of lab. Feb. 24/27 Lab 10 Responsiveness and Behavior Experimentation of human senses: touch‚ taste‚ smell‚ hearing and vision.
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INTRODUCTION Levels of organization (cell to biosphere) and characteristics of life Levels: Cells->tissue ->organs & organ systems->organisms->populations->communities->ecosystems-> biosphere Characteristics of life: Cell and Organization: Each cell can only do the job it is tasked with. Example: brain cells Energy Use and Metabolism: Energy is needed many organisms. Energy is utilized in chemical reactions Response to Environmental Changes: responds to stimuli Regulation and Homeostasis: ex:
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Midterm 1 stuff (1‚ 25‚ 26‚ 27‚ 28) 2) What characterizes a prokaryotic cell? a. the lack of ribosomes b. the lack of a membrane-enclosed nucleus c. the presence of a nucleus with no DNA d. the presence of mitochondria e. having a cell wall without a cell membrane 3) Which of the following does NOT comprise a logical hierarchy of organization? a. family‚ order‚ class‚ phylum‚ kingdom b. molecules‚ cells‚ tissues‚ organ systems‚ populations c. organisms‚ populations‚ communities‚ biomes
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Chapter 2: Patterns in Nature 1. Cell theory • 1590: Dutch grind glass lens (1st compound microscope) • 1665: Robert Hooke uses compound m. analysis thin cork slices as filled with air enclosed in boxes (cells) distinct • 1676: Dutch sees microorganism under microscope from pond water • 1824: French suggest all organisms composed of cells • 1827: Robert Brown (Brownian motion) discovered nucleus in plant cell • 1838: German produced evidence that all organisms made of cells • 1859:
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