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Subject: Fwd: Need Sources for three 'facts' (3)
From: [log in to unmask]
Reply-To:[log in to unmask]
Date:Thu, 3 Apr 1997 19:11:42 -0500
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The third answer...Are there more?
Will
---------------------
Forwarded message:
From:   [log in to unmask] (Ray Ritchie)
To:     [log in to unmask]
Date: 97-04-03 00:41:46 EST

Dear Bill,
        (1) is wrong, an unfortunate urban fable. A lcosely related fable
is that a few litres of algae can supply enough oxygen for a man such as an
astronaut.
        (2) another fable.
        (3) Partially correct. Filamentous prokaryotic cells resembling
modern blue-green algae go back about 3 billion years. Most ancient "algae"
were photosynthetic bacteria that use light to fix carbon but do not
envolve oxygen.  Blue-green algae have an oxygen-evolving photosynthetic
mechanism essentially similar to higher plants. Benn around for at least 2
billion years. Look in a good Biology Text Book for 1 st year students.

        I am a post-doctoral in algal photosynthesis and bioenergetics.

                Ray RITCHIE

Raymond J. RITCHIE
Biology A-12, The University of Sydney,
Sydney, NSW 2006, Australia.

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