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Topic Report Cell Death: From Morphological to Molecular Definitions
Topic Report Cell Death: From Morphological to Molecular Definitions

... A cell should be considered dead when any one of molecular-morphological criteria is met: Definition ...
NAME PRD _____ DATE ______ MULTIPLE CHOICE: Write the
NAME PRD _____ DATE ______ MULTIPLE CHOICE: Write the

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Attachment 2
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... and detoxifies candy distinguish it from rough ER drugs Assembles proteins Candy buttons Candy buttons (round pieces of to be used by the or paper with candy on paper) looks like rough cell lentils glued on ER with the candy representing the ribosomes. Some students may also add some r ...
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Cell Structure and Function The cell is the smallest unit of life that
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[Kliknite ovde da ukucate naslov]
[Kliknite ovde da ukucate naslov]

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How
does
having
soP
cells
affect
a
plant?
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plant
cells
are
turgid,
what
statement
can
you
make
about
the
amount
of
water
in
the
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The Derivation of Oligodendrocyte Progenitors

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B- Eukaryotic Cell

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Amitosis

Amitosis (a- + mitosis) is absence of mitosis, the usual form of cell division in the cells of eukaryotes. There are several senses in which eukaryotic cells can be amitotic. One refers to capability for non-mitotic division and the other refers to lack of capability for division. In one sense of the word, which is now mostly obsolete, amitosis is cell division in eukaryotic cells that happens without the usual features of mitosis as seen on microscopy, namely, without nuclear envelope breakdown and without formation of mitotic spindle and condensed chromosomes as far as microscopy can detect. However, most examples of cell division formerly thought to belong to this supposedly ""non-mitotic"" class, such as the division of unicellular eukaryotes, are today recognized as belonging to a class of mitosis called closed mitosis. A spectrum of mitotic activity can be categorized as open, semi-closed, and closed mitosis, depending on the fate of the nuclear envelope. An exception is the division of ciliate macronucleus, which is not mitotic, and the reference to this process as amitosis may be the only legitimate use of the ""non-mitotic division"" sense of the term today. In animals and plants which normally have open mitosis, the microscopic picture described in the 19th century as amitosis most likely corresponded to apoptosis, a process of programmed cell death associated with fragmentation of the nucleus and cytoplasm. Relatedly, even in the late 19th century cytologists mentioned that in larger life forms, amitosis is a ""forerunner of degeneration"".Another sense of amitotic refers to cells of certain tissues that are usually no longer capable of mitosis once the organism has matured into adulthood. In humans this is true of various muscle and nerve tissue types; if the existing ones are damaged, they cannot be replaced with new ones of equal capability. For example, cardiac muscle destroyed by heart attack and nerves destroyed by piercing trauma usually cannot regenerate. In contrast, skin cells are capable of mitosis throughout adulthood; old skin cells that die and slough off are replaced with new ones. Human liver tissue also has a sort of dormant regenerative ability; it is usually not needed or expressed but can be elicited if needed.
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