Cell theory
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Cell theory
Cell theory
Cell theory2.1.1Outline the cell theory.The cell theory states that:All Irving organisms are composed of cells Multicellular organisms (example humans Cell theory s) are composed of many cells while unicellular organisms (example: bacteria) are composed of only one cell Cells are the basic unit of structure in all organisms.Cells are the smallest unit of life They are the smallest structures capable of surviving on their own.Cells come from pre-exsisting cell Cell theory s and cannot be created from non-living material. For example, new cells arise from cell division and a zygote (the very first cell formed when an orgCell theory
anism is produced) arises from the fusion of an egg cell and a sperm cell.2.1.2Discuss the evidence for the cell theory.When scientists started to looCell theory2.1.1Outline the cell theory.The cell theory states that:All Irving organisms are composed of cells Multicellular organisms (example humans Cell theory d to call cells. When these cells were taken from tissues they were able to survive for some period of time. Nothing smaller than the cell was able to live independently and so it was concluded that the cell was the smallest unit of life. For some time, scientists thought that cells must arise from Cell theory non-living material but It was eventually proven that this was not the case, instead they had to arise from pre-exsisting cells. An experiment to provCell theory
e this can be done as followsTake two containers and put food in both of theseSterilize both of the containers so that all living organisms are killedCell theory2.1.1Outline the cell theory.The cell theory states that:All Irving organisms are composed of cells Multicellular organisms (example humans Cell theory that was sealed no mold will be present The reason for this is because in the open container, cells are able to enter the container from the external environment and start to divide and grow. However, due to the seal on the other container no cells will be able to enter and so no mold will develop, Cell theory proving that cells cannot arise from non-living material2.1.3state that unicellular organisms carry out all the functions of life.2.1.4Compare the relCell theory
ative sizes of molecules, cell membrane thickness, viruses, bacteria, organelles and cells, using the appropriate SI unit.Remember:1 millimeter (mm) =Cell theory2.1.1Outline the cell theory.The cell theory states that:All Irving organisms are composed of cells Multicellular organisms (example humans Cell theory eria = 1pmOrganelles ■ up to 10 pmEukaryotic cells = up to 100 pm2.1.5Calculate the linear magnification of drawings and the actual size of specimens in images of known magnification.Take a measurement of the drawing (width or length)Take this same measurement of the specimenRemember to convert unit Cell theory s if needed toPlace your values into the equationMagnification = length of drawing / length of actual specimenYou can also calculate the length of theCell theory
specimen if this is unknown: length of the drawing / magnification.Conversion of units:1 centimeter ■ 10’ meters1 millimeter = 10- meters1 micrometerCell theory2.1.1Outline the cell theory.The cell theory states that:All Irving organisms are composed of cells Multicellular organisms (example humansCell theory2.1.1Outline the cell theory.The cell theory states that:All Irving organisms are composed of cells Multicellular organisms (example humansGọi ngay
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