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The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. And that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
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PGA not sure But Ithink that the correct answer
Explanation:
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True, the model had to change as new information came to light.
After the invention of new instruments, it enable us to do more research and verify old theories.
Dalton atomic theory states that matter is composed of very small particles called atoms which is indivisible. Indivisible means cannot be broken down into simpler substances. But Rutherford performed an experiment and concluded that atom is divisible into proton, electron and neutron. Electron is present in the shell while proton and neutron are present inside the nucleus of an atom.
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<h3>
The Prokaryotic Cell</h3>
Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid.
<span>The theory of Alkaline Vents theorizes that life originated deep under the sea around hydrothermal vents. This could be likely because these vents provide plentiful methane and ammonia. Critics, however, point out that high temperatures are not conducive to organic life.</span>
