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All aggregated cells and free-living cells above the monerans contain at least
one nucleus or similar organelle. In monerans the genetic material is dispersed
in the cytoplasm. A nucleus is a spheroid body within a cell which usually is
Longitudinal sections of one orangish Y-shaped cardiac muscle cell, with large
bluish-gray nucleus, and parts of two other such cells in lower half of picture. The
Y-shaped muscle cell extends in from edge of picture at about 7 o'clock position.
When the process is complete, perhaps each of the newly formed rings could
attach to the surface, triggering the next stage of division. Studies with other types
of cells indicate that the signal for replication must come from outside the nucleus
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I purchased this book many years ago and found it very enlighting. The shredout concept was of particular interest to me in that it provided ways to look at various living systems from micro to macro. It has a lot of detail which I never was able to get around to studying, but appears to have influenced my thinking which was later documented in a series of blogs http://www.bcswonline.com/blog/index.html
I still have a copy and refer to it.
TABLE 11 The 19 Critical Subsystems of a Living System
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