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What is the function of mitosis and cytoplasmic division?

All organisms depend on mitosis for growth and cell replacement. Mitosis and cytoplasmic division, or cytokinesis, provide organisms the ability to develop and grow as well as providing for the replacement of old cells and the creation of new cells to repair damage. Some organisms use mitosis to regenerate lost or damaged body parts. For example, after a lizard loses its tail in self defense, mitosis allows it to regenerate a new tail. Mitosis also allows for reproduction in organism that reproduce asexually.\nMitosis involves four stages and ends with cytokinesis. During the first stage, prop..

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How is resting membrane potential maintained?

The resting membrane is established and maintained because the phospholipid bilayer contains a middle section that repels charged molecules and ions. As a result, the ions can only pass through the membrane if there are channels for the ions. Certain molecules, such as DNA and many negatively charged protons, contribute a negative charge to the cell and cannot diffuse out along their concentration gradient.\nThese negatively charged molecules in the cell allow the cell to maintain a concentration gradient by pumping the positively charged cations alone. Although both sodium and potassium ions ..

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How does climate affect the way people live?

Most people structure their day-to-day activities around the current climate. Climate changes affect society by impacting various social, cultural and natural resources. For example, infrastructure, transportation systems, energy, food, and water supplies are all affected by climate change. The climate also affects economic activities and services. Professions and industries that are closely linked to weather and climate, such as agriculture and outdoor tourism, rely on certain climatic conditions.\nClimate impacts health in various ways, through heat waves, extreme weather events, reduced air..

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How long after you eat is your stomach empty again?

PWH lists liquid foods, protein-rich meals and some drugs, including cisapride, erythromycin and metoclopramide, as some of the reasons for faster-than-average stomach emptying. The factors that inhibit the process include fat-rich food, anxiety, diseases and drugs such as opioids. In severe cases, such as gastroparesis, stomach emptying can be inhibited to the point where it causes nausea, burping and vomiting, according to the Three Rivers Endoscopy Center for Digestive Health and Nutrition.

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How are climate and weather related?

Weather involves several factors that occur in the atmosphere, such as temperature, humidity and rainfall. It varies from place to place. Some locations have a cloudy or rainy weather, while other areas have a hot and dry weather. Weather events across the globe are predicted and recorded by meteorologists every day.\nDaily temperature and precipitation are part of daily weather. Meteorologists provide information on changing weather on a daily basis. Weather can be sunny, rainy, snowy, humid, dry, hot or cold. Daily events of people are often affected by the current weather conditions.\nClima..

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What are the roles of the spleen and marrow?

All cells of the immune system come from bone marrow. Cells form through haematopoiesis; during this process, cells divide into either mature cells of the immune system or into premature cells that travel beyond the bone marrow to continue growing.\nThe spleen is an essential organ that filters the blood. The spleen consists of T cells, B cells, dendritic cells, macrophages and red blood cells. In addition to eliminating antigens (foreign materials) from the blood, the spleen initiates an immune response to combat infections. The spleen is, essentially, an immunological command center. During ..

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How does your leg work?

Different muscle groups are responsible for the action of the major joints in the leg. For example the muscles of the buttocks, hips and pelvis are essential for the proper performance of the hip joint, which is a ball-and-socket joint. Alternatively, the quadriceps and other muscles of the thigh are meant to execute lifts and extensions above the knee.\nThe knee itself is a joint that affords the leg an immense amount of flexibility and is the site where the two major leg bones, the femur and the tibia, meet. The knee also provides a nexus for various tendons and ligaments that facilitate leg..

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What weighs 1 ounce?

Other items or collections of items which weigh 1 ounce include: 28 paper clips, five U.S. quarters, and a compact disc (CD). An ounce is also a measurement of volume. A liquid ounce is an American measurement that is equal to 29.57 milliliters, or 1/8th of a cup.\nBoth liquid and solid ounces are a part of the United States customary units, a set of measurements which were derived from the British Imperial units. U.S. or Imperial units bear similar names, but differ slightly in size; a gallon of milk in America is not the same as a gallon of milk in England.

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How can I contrast chemical energy and mechanical energy?

Chemical energy exists as potential. When the molecules that it inhabits metabolize, chemical energy is released into a kinetic state. In some instances, that release is explosive, causing the rapid conversion of chemical energy to thermal and radiant energy.\nPlant cells convert radiant energy to chemical energy using photosynthesis, ultimately manufacturing carbohydrates. Carbohydrates are stockpiled until biochemical processing breaks down the complex compounds into simpler elements, releasing thermal energy. Machines convert fuel by burning to produce force that impacts an object. An examp..

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Are cellular respiration and photosynthesis related?

Cellular respiration uses sugars, and animals which consume other forms of calories than carbohydrates, proteins and fats must first process them into a usable form. Cellular respiration is not the only way that heterotrophs gain energy from the environment, with both glycolysis and fermentation being independent of oxygen, but it is by far the most efficient.\nThe vast majority of species undergo cellular respiration, with a much smaller number engaging in photosynthesis. Nonetheless, photosynthesis is the main way that energy enters the biosphere, with the only exceptions being specialist or..

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