Introduction Diffusion and osmosis are two types of passive transport. Diffusion is a random movement of molecules from an area of high concentration to an area of low concentration. Osmosis is a type of diffusion that diffuses water through a selectively permeable membrane. There were two parts to the experiment‚ the dialysis tubing lab and the potato lab. In the first experiment‚ the dialysis tubing acted as a semi-permeable membrane. A semi-permeable membrane is a membrane
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As geologists‚ we examine layers of sediment on the Earth’s surface to approximate the dates of past geologic time periods. Ah sediment as you know is material like sand‚ gravel‚ fossil fragments that is transported by natural processes like wind ‚ water flow or the movement of glaciers. So sediment is transported and then deposited and it forms layers on the Earth’s surface over time. We examine these layers to learn about different geologic time periods including when they began and ended. For
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correct. High Power should show only a couple of cells that take up most of the viewing field. The micoscope is designed to view the slide at different spots‚ so not all drawings will look like this one. Images were snipped from the virtual microscope’s flash animation. Scanning (4) | Low (10) | High (40) | 3. Go to google and type "cheek cells" into the search box. Click on "images" to see all the images google has found on the web showing cheek cells (there should be hundreds). What do all of
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Sculpting the Earth’s Surface The Grand Canyon The state of Arizona is home to one of the most breath taking canyons known to Earth‚ the Grand Canyon. Its astounding depth and extravagant size are both mouth dropping and catching to the public’s eye. It is one of the world’s most popular tourist’s attractions that lour millions of people from all over the world every single year. With its deep color‚ size and beautiful display of rock layers‚ the Grand Canyon is a view few people will not forget
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Lab 8: Mitosis‚ Meiosis and the Cell Cycle . header Purpose: This activity is designed to familiarize you with the phases of mitosis and meiosis and compare these processes in a comparison chart. This activity will be three parts. For parts I and II‚ please scan your labeled work. Preparation: There is no preparation or materials needed for this activity. You will simply need access to a scanner to submit your work. Procedure Part 1: For this portion of the laboratory‚ please sketch a cell
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Skimming the Surface of Babbitt Not all of us can have a great escape with that fairy child in our dreams. In Chapter 1 part II of the satirical phenomenon‚ Babbitt‚ by Sinclair Lewis; he really gives you something to ponder. In the previous section Lewis had just ended saying how the city of Zenith was “built-it seemed- for giants”‚ putting this city on a pedestal for its community. This statement is already mocking the citizens of Zenith who are materialistic middle-classmen‚ like Babbitt
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1. INTRODUCTION A solar cell is a device that converts the energy of sunlight directly into electricity by the photovoltaic effect. Sometimes the term solar cell is reserved for devices intended specifically to capture energy from sunlight‚ while the term photovoltaic cell is used when the light source is unspecified.”Photovoltaics” the field of technology and research related to the application of solar cells in producing electricity for practical use.
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The fluid mosaic model of the cell membrane. What is the fluid mosaic model? The fluid mosaic model is a model conceived by S.J. Singer and Garth Nicolson in 1972 to describe the structural features of biological membranes. The membrane is described to be fluid because of its hydrophobic integral components such as lipids and membrane proteins that move laterally or sideways throughout the membrane. That means the membrane is not solid‚ but more like a ’fluid’. The membrane is depicted as mosaic
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Surface Marking of the Lungs The apex of the lung extends upwards for one to two inches above the anterior extremity of the first rib‚ and is indicated by a curved line drawn from the upper border of the sterno-clavicular articulation to the junction of the inner and middle thirds of the clavicle‚ the highest part of the curve being from 1/2 inch to 1 1/2 inches above the clavicle. The apex of the right lung is 1/2 inch higher than that of the left. The subclavian artery lies on the cervical pleura covering
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Diffusion of responsibility is a pervasive socio-psychological phenomenon that is deeply entrenched in all societies. This tends to occur when the size of a group reaches a certain threshold and individuals within the group assume that others will take action or have already intervened‚ commonly resulting in the collective inaction by potential helpers. Another contributing factor is the gender of the individual in need for help which affects the action/inaction of the individuals in the group. The
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