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A Little History of the World

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A Little History of the World
1.Ask a Question, Do Background Research, Construct a Hypothesis, Test Your Hypothesis by Doing an Experiment, Analyze Your Data, and Draw a Conclusion, Communicate Your Results.
2.The cell is basic unit of life, All living things are made up of one or more cell, All cells come from other living cells.
3.the microscope made by benjemen franklin.
4.There are two types of cells: prokaryotic and eukaryotic. Prokaryotic cells are the oldest; all organisms were made up of these cells during the first billion years of life on Earth. For the past billion years eukaryotic cells have made up most organisms. There are several ways to compare and contrast prokaryotic and eukaryotic cells. Compare by size. Prokaryotic cells are significantly smaller than eukaryotic. In fact, eukaryotic cells are typically about ten times larger than prokaryotic cells. The size of cells is usually measured in micrometers, with the average prokaryotic cell being around one micrometer wide.
5.diffusion is the transport of solvent from higher concentration to lower concentration. osmosis is the movement of solvent from lower to higher concentration faciliated diffusion is the movement of solvent down the concentration gradient through channels(carrier molecules)...no energy is required. in active transport is the movement of substance in uphill direction...there is energy requirement(ATP.NA/K pump)
6.A semi permeable membrane means that the membrane is selective in what is allowed into the cell. Some items such as toxins or some proteins are too big to enter the cell with out facilitaion. Other things such as gas and water are small enough to pass through. These items are usually hydrophilic and ionic it makes them easier to pass through the membrane. So basically semi permeable means somethings can get through without the help of diffusion or the cell. Others must use energy to get in or out of the cell.
7.The nucleus regulates all cell activity. The nucleolus is the nuclear subdomain

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