Re: Sorry, no fish in the DNA tank

rnorman wrote:
On Nov 14, 5:40 pm, "Lee" <m...@xxxxxxxxxxxxxxxxxxx> wrote:
"(M)-adman" <g...@xxxxxxxxxx> wrote in message

news:XRlTk.65425$De7.41686@xxxxxxxxxxxxxxxxxxxxxxxxx





Lee wrote:
"(M)-adman" <g...@xxxxxxxxxx> wrote in message
news:SxiTk.65645$rD2.35918@xxxxxxxxxxxxxxxxxxxxxxxxx
Without a major overhall of the human DNA structure, it is simply
an impossibility for fish to become man.

DNA has an error correction system that prevents such an over
haul.

--

It is all about the truth with:
^^^^^^^^^^^^^^^^^^^^^
·.¸Adman¸.·
^^^^^^^^^^^

You would not think so considering that humans spend their first 9
month in a liquid environment on which they are partially dependent
for both food and respiration.

do you know what an apples to apple comparison is?

how about what the umbilical cord does?

Béatrice de Planissoles a catholic used to dry them and use them in
healing till the Spanish Inquesition caught up with her but that is
another story.

Ok not so much about Nutrition but why would terestrial animals need
to develop in the liquid environment of an egg or womb like fishes
or other aquatic creatures

There are a large number of reasons that vary depending on how close
to the fertilized egg you are developmentally.

The most important reason is that living cells need to be in water; if
they dry out they die. It is an amusing paradox that no cell of our
body can live in the dry terrestrial environment that we live in as
multicellular individuals. The solution is that the cells that face
the external environment are generally dead; those that are alive live
in a different internal environment, one that is liquid and salty.
(Yes, there are specialized surfaces like the eye and the linings of
our mouth, nose, and other orifices but these are maintained moist
with special mechanisms.) Until an organism can develop a good
waterproof external layer, it must be kept in water. The reason for
the salt is peculiar to animals and has to do with osmotic pressure.
The inside of the cell is necessarily salty. A cell put into fresh
water or too dilute a salt concentration will take on water by
osmosis, swelling. If there is no strong cell wall to confine the
cell, it will simply burst. Animals don't have cell walls so animal
cells must live in salt water. (Freshwater protozoa, single-celled
animal-like organisms, have specialized means to handle this
situation, but that is another story.) So everything has to be kept
wet or at least covered in moisture and salty moisture at that.

The second reason has to do with surface tension, something we are so
large we tend to ignore. However it is really a BIG DEAL with small
things. Wet hair tangles. You can't turn the pages of a wet
newspaper. However completely submerged in water, each strand of hair
floats freely and independently and the pages of the newspaper
separate readily. Keeping a developing organism submerged entirely in
water allows for the free and independent movement of different body
parts. That is also an important point in allowing for the proper
development of internal structures like the lungs and digestive tracts
that have openings to the external environment. Completely filled
with water they can move readily. Once the organism is sufficiently
developed, there are special mechanisms to keep the surfaces moist.
Most such surfaces secrete mucus, that slimy goo that keeps things
well watered and lubricated. The lungs secrete a special surfactant
to reduce the surface tension. Until that surfactant is produced in
sufficient quantity (or now added by medical intervention) a preemie
cannot survive.

Another reason that applies to large animals later in development is
the bouyancy of living in an aquatic environment. It is not necessary
to worry about supporting the weight of a structure as it develops.
Eventually, when you hatch or are born, you do have to contend with
that problem but by then you have presumably developed a good skeletal
structure. However if you develop in water, you don't have to worry
about the exact timing about when your skeletal structures (not just
bone, but tendons and all sorts of connective tissues) are strong
enough..

Floating in water also is an important way of protecting the
developing the embryo/fetus against injury from external mechanical
blows and shocks. The force of a blow is distributed as fluid
pressure and applied uniformly and evenly across a very large surface
of the body instead of in a sharply defined location. A force applied
to a very small area produces large stress, enough to tear and damage
tissue. That is why a sharp knife cuts easily; the area through which
force is applied is made very tiny.

I think there are a bunch more reasons, that I had in mind when I
thought about answering this post but they seem to have slipped my
mind at the moment. But these should be enough!

Wow. That was indeed intresting.

If you had to show examples of how this impacts creation on the one hand and
evolution on the other, How would you?


.

Relevant Pages

  • Re: Sorry, no fish in the DNA tank
    ... develop in the liquid environment of an egg or womb like fishes or other ... waterproof external layer, it must be kept in water. ... The inside of the cell is necessarily salty. ... there are special mechanisms to keep the surfaces moist. ...
    (talk.origins)
  • Re: Sorry, no fish in the DNA tank
    ... month in a liquid environment on which they are partially dependent ... waterproof external layer, it must be kept in water. ... The inside of the cell is necessarily salty. ... I do not know the details about the evolution of the amniotic ...
    (talk.origins)
  • elibrary 5th
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  • elibrary 5th
    ... Drought Management and Its Impact on Public Water Systems: ... Regulating Chemical Accumulation in the Environment: ... Climate Change Policy after Kyoto: ... Acute Exposure Guideline Levels for Selected Airborne Chemicals: ...
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  • Re: Genetic or Epigenetic: The Causal Basis of Evolutionary Change
    ... And, importantly, the degree to which a cell in a ... between cells and their environment. ... of these cells (genes transmit a capacity). ... In most invertebrates and vertebrates,the CNS accomplishes these ...
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