Thanks for the clarification Art. Very true, that plants do intake a very
little bit of oxygen during their day/night cycle. Some take it from the
air, some get it from the water in the soil, and others just use oxygen
left from their own photosynthesis cycle. I know I was never taught that in
high school biology. I guess the important thing in the example is that
plants generally do the reverse of what we do when they "breath", and they
produce a lot more oxygen than they use up, while producing no carbon
dioxide.
Mark Janzen
Registrar/Collections Manager
Edwin A. Ulrich Museum of Art
Martin H. Bush Outdoor Sculpture Collection
Wichita State University
(316)978-5850
Art Harris
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Re: tell the cyanobacteria
06/02/2005 12:22
PM
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Good post, Mark, except for one infelicity. Plants take in oxygen, just
as we do, for cellular respiration; the intake of carbon dioxide is for
photosynthesis (a waste product of which is oxygen). Since the usual
discussions about plants emphasize photosynthesis, it's not widely
understood that plants utilize oxygen to release energy from the food
stuffs they make by photosynthesis.
Regards,
Art Harris
Laboratory for Environmental Biology, Centennial Museum
University of Texas at El Paso, El Paso, TX 79968-0915
[log in to unmask] http://museum.utep.edu/
http://museum.utep.edu/chih/chihdes.htm
Mark Janzen wrote:
> Indeed! Good call Lois. We should all be careful not to get on their bad
> side. They are still cleaning out lots of the nasty stuff we spew into
the
> air, and continuing to give us a large percentage of our oxygen.
>
> Mr. Gonzales is simply following the ID party line, which is generally to
> try and force scientific theory to fit their philosophical mold. Most of
> his scientific suppositions and presumptions are seriously flawed as a
> result. The rest are generally non-sequiturs, in relation to the argument
> he hopes to make.
>
> A good example... The Earth's atmosphere is NOT clear because of its
> average sea level oxygen content of 20%. It is clear because all of the
> gasses that compose it are clear within the average temperature range of
> the planet. It is 79% nitrogen as well. Oxygen content can drop to 7% or
> less at high altitudes, yet strangely there is still lots of life. Hmmmm,
I
> wonder if that should make the atmosphere more or less clear. A
relatively
> high oxygen content is required for our particular form of life to
> flourish, but certainly not all. Plants breath carbon dioxide, which of
> course kills us in high enough concentration. Habitability is a very
> relative term, unless you mean habitable by humans. Why he considers it
> non-coincidental that we can now look up to view the stars through said
> clear atmosphere is an utter mystery to me, scientifically speaking.
>
> Mark Janzen
> Registrar/Collections Manager
> Edwin A. Ulrich Museum of Art
> Martin H. Bush Outdoor Sculpture Collection
> Wichita State University
> (316)978-5850
>
>
>
> Lois Brynes
> <deeptime@ADELPHI
> A.NET>
To
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> <[log in to unmask]
> SE.LSOFT.COM>
Subject
> Re: tell the cyanobacteria
>
> 06/02/2005 07:13
> AM
>
>
> Please respond to
> Museum discussion
> list
> <[log in to unmask]
> SE.LSOFT.COM>
>
>
>
>
>
>
> Um, and just how did the atmosphere come by all this purposeful oxygen?
> Hello.
> On Jun 2, 2005, at 7:52 AM, L Dewey wrote:
>
> the high oxygen content of the atmosphere, a condition that also
is
> needed for complex life.
>
>
> While the theory does argue for intelligent design, it is not an
> argument for or against Darwin's theory of evolution.
>
> "It has absolutely nothing to do with biological evolution,"
Richards
> said. "We are talking about the things that you need to produce a
> habitable planet, which is a prerequisite for life. It doesn't tell
> you anything about how life got here."
>
>
>
>
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