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| Science Forum Index » Bio Evolution Forum » More Developments - If catabolic and anabolic are... |
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| Tom Hendricks... |
 Posted: Mon Oct 12, 2009 6:20 am |
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Guest
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Start with the premise that catabolic and anabolic processes are often
separate and often evolve separately.
The reason most genomes are so similar is because catabolic processes
of making energy are so similar.
The reason genomes are so different is because anabolic process use
that energy for different reasons.
The catabolic processes are similar in most species groups
Two examples are all photoautotrophs, or all heterotrophs .
PHOTOSYNTHESIS: The photosynthesis process is similar among plants,
while what the plants do with the energy is different and varied.
OXIDATION: The process of oxidation of organic compounds is similar
among animals, while what the animals do with the energy is different
and varied
If catabolic and anabolic are separate, they can develop separately.
That suggests the following
Certain metabolic groups may have stronger catabolic aspects than
others .
Certain species may have stronger catabolic aspects than others.
One sex may have stronger catabolic aspects than the other.
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We may also look at the catabolic / anabolic processes not only as
separate but in their intensity. I suggest that some biomes may have
higher catabolic / anabolic rates, and some may have lower catabolic /
anabolic rates. Compare these two.
Tropical rain forest, with high energy input, may have all its species
with high catabolic AND anabolic processes.
Dry cold winter desert with low energy input, may have all its species
with low catabolic AND anabolic processes. |
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| Tom Hendricks... |
| Posted: Wed Oct 14, 2009 5:31 am |
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Guest
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Here are two more ideas connected to the anabolic / catabolic split.
1.
Certain seasons in biomes with noticeable changes in seasons may have
higher catabolic / anabolic processes due to the availability of
nutrients, water, sunlight, etc.
Catabolic / anabolic processes should be higher in spring and summer
than the cold of winter.
Catabolic / anabolic processes should be higher in certain biomes in
the sea due to the availability of nutrients, water, sunlight etc.
Catabolic / anabolic processes should be higher in coral reefs and
lower in the abyssal zone at the bottom of the ocean.
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2.
Catabolic / Anabolic divisions list - new items.
CATABOLIC - Hydrolysis
ANABOLIC - Condensation Reactions.
TYPE OF SELECTION PRESSURE NOW. All the major metabolic pathways seen
in prokaryotes probably evolved in first billion years. The catabolic
processes seem to be highly conserved such that stabilizing selection
predominates. Example glycolysis, the only metabolic pathway common to
nearly all modern organisms.
CATABOLIC - Stabilizing Selection
ANABOLIC - Directional and Diversifying selection.
Tom |
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