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Assignment - 4. QUIZ 1
Attempt 5 of 2
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Describe the structure and function of the cell membrane.

Cell membrane is a thin and elastic membrane covering cytoplasm.

Cell membrane functions as a semi-permeable barrier,allowing a very few molecules across it while fencing the majority of chemicals inside cell.In this way,cell membrane maintains the internal composition of cell.In addition to this vital role ,cell membrane can also sense chemical messages and can identify other cells.

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hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

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