Is Evolution Needed to Make Sense of Biology?
By Julie Thomas
"Nothing in biology makes sense except in the light of evolution."
This was the title of an essay by Theodosius Dobzhansky
written over thirty years ago and is the position
of most Darwinists today. If nothing in biology
makes sense except in the light of evolution, this
would mean everything in biology would collapse
into senseless gibberish without evolution. It would
mean that all of biology would become incoherent if
the concept of evolution was not applied. This would
also mean that without evolution, no biological
research could be done. My, it's interesting how a
useful and fruitful concept can be elevated to the
level of a necessary, all-important, and primary concept.
Now, since nothing in biology makes sense except in the light of
evolution, evolution must be *needed* by biology. This means,
I suppose, that biology did not come into existence until evolution
(however you define it) was realized. How Harvey ever made sense
of the circulatory system and Mendel made sense of inheritance must
be a truly thorny problem for those who believe nothing in biology
makes sense without the light of evolution. But there's more.
In what way was evolution needed to determine that DNA is
the genetic material?
In what way was evolution needed to determine that DNA is
two strands of nucleotides arranged as a double-helix?
In what way was evolution needed to crack the genetic code?
In what way was evolution needed to understand the lac operon?
In what way was evolution needed to determine that ribosomes
synthesize proteins?
In what way was evolution needed to determine the fluid mosaic
model of the cell membrane?
In what way was evolution needed to determine the mechanism
of the F-ATP synthase?
After all, none of these important biological insights could have
been made without a concept that is *needed* to make sense of
*all* of biology?
While we're at it, why do we need need evolution to make sense of
the following biological phenomena (for starters):
*photosynthesis
*protein synthesis
*LTP in Aplysia
*the role of potassium and sodium channels in action potentials
*membrane synthesis
*the influence of blood pressure on cardiac output
*incomplete dominance
*forming spindle fibers during mitosis
*cytokinesis
*forming actin-myosin cross-bridges during muscle contraction
*shuttling proteins across the nuclear pore complex
*chromosome structure and packing
*signal transduction
*protein folding
*the peptidoglycan cell wall
*the relationship between Tay-Sachs disease and lysosomal hydrolases
*the electron transport chain
*the trp operon
*insulin and the regulation of blood glucose
*DNA recombination
*IREs and iron metabolism
*axonemal form and function
*desmosomes
*G1 checkpoints
*regulation of membrane fluidity
*regulation of 5S rRNA expression
*glomerular filtration and urine formation
*conjugation
*the MTOC
*transport and modification through the ER
That's enough for now. I don't need evolution to make sense of
these phenomena. Of course, evolution might (and does) contribute
insights on these phenomena that lead to research, and one can always
busy themselves trying to explain the origin of these things in light
of evolution, but none of this means that evolution is required to make
any sense of this stuff. Why is it that things like chromosome
structure, iron metabolism, urine formation, and LTP make no sense
without evolution? How is it that evolution alone allows us to see
the role of glomerular blood pressure in urine formation rates? Can't we
teach students how proteins are formed without first explaining how the
protein synthesis machinery evolved? I learned about protein synthesis
without any reference to its evolution. I suppose this means my instructor
and I were more gifted than the scientific community which stumbles about
bumping its head in the dark without the necessary illumination of evolution.
Of course, maybe things have changed. So I close my eyes and
reach into my large file of articles (skewed with many focused on
evolution) and randomly pull one out. Surely since nothing in
biology makes sense without evolution I could not find one
single article which makes sense without evolution. I pull out:
Temperature sensing in bacterial gene regulation - what it all boils down to.
It makes lots of sense although I don't see where
evolution is being used as the Guiding Light. If nothing in biology
makes sense except in the light of evolution, why am I having a hard
time finding where evolution is absolutely required to turn gibberish
into meaningful concepts? Why is it so easy to find things that
would still make lots of sense if evolution was not true?
Finally, let's consider the words of someone like H. Allen Orr who,
in his review of Behe's book, wrote:
"there's a striking asymmetry in molecular versus evolutionary
education in American universities. Although many science, and all
biology, students are required to endure molecular courses, evolution-
even introductory evolution-is often an elective. The reason is simple:
biochemistry and cell biology get Junior into med school, evolution
doesn't. Consequently, many professional scientists know surprisingly
little about evolution."
Let's see. Many professional scientists know surprisingly little about
evolution. But how can the indispensable guiding light of biology be
so unimportant for so many professional scientists? These poor
scientists must not publish anything, and are incapable of teaching,
as biology must not make any sense to them at all. Furthermore, note
how Orr assumes that education in biochemistry and cell biology
does not presume at least education in an introductory evolution
course. How can this be? If nothing in biology makes sense without
evolution, then biochemistry and cell biology would not make sense
without evolution. This means students without a solid understanding
of evolution would do poorly in these classes, meaning they would
be weeded out. Since evolution is needed to make sense of cell biology,
any learning of cell biology must entail an understanding of evolution.
Thus, why it is that "many professional scientists know surprisingly
little about evolution" is an enigma.
Sorry, but I think the notion that "nothing in biology makes sense
except in the light of evolution" is a bogus and tired propagandistic
claim. Lots of things make sense in biology without the light of
evolution. That's why it's possible that "many professional
scientists know surprisingly little about evolution."
Dawkins, Richard. 1987. The Blind Watchmaker. On page 283:
"It isn't that any transformed cladists are themselves
fundamentalist creationists. My own interpretation is that they
enjoy an exaggerated idea of the importance of taxonomy in biology.
They have decided, perhaps rightly, that they can do taxonomy
better if they forget about evolution, and especially if they never
use the concept of the ancestor in thinking about taxonomy. In the
same way, a student of, say, nerve cells, might decide that he is
not aided by thinking about evolution. The nerve specialist agrees
that his nerve cells are the products of evolution, but he does not
need to use this fact in his research. He needs to know a lot
about physics and chemistry, but he believes that Darwinism is
irrelevant to his day-to-day research on nerve impulses. This is a
defensible position."
One could, I suppose, argue that these professional scientists don't
contribute any good science, but there is not a shred of evidence for
that type of ad hoc claim.