Page 93 - The Evolution Impasse 2
P. 93
Origin of the Bacteria 91
mat ter could have pro duced bac te - ing down the ab sorbed nu tri ents.
ria. Like all liv ing cells, bac te ria con -
Until re cent ly, many sci en tists re - tain DNA that con trols the growth,
gard ed bac te ria as a sim ple life form. re pro duc tion and oth er ac tiv i ties. In
But de tailed re search has shown that bac te ria, DNA moves free ly in the
they are quite com plex, even though cell's cy to plasm. Apart from cells
they are minute, sin gle-celled crea - with out nu clei (called prok ar y o tes),
tures. ev ery cell con tains DNA in its nu cle -
Nearly all spe cies of bac te ria are us, sep a rat ed from the cy to plasm by
sur round ed by a pro tec tive wall that a mem brane.
shapes their cells and al lows them to Within these cells oc cur vi tal bio-
thrive in quite dif fer ent en vi ron - chem i cal ac tiv i ties that en sure the
ments. Some spe cies of bac te ria pos - con tin u a tion of life on Earth.
sess a thin lay er which sur rounds Bacteria per form es sen tial func tions
the cell wall. Within the cell wall of in the plan et's ec o log i cal sys tem. For
all bac te ria, there is an elas tic cell ex am ple, some bac te ria break down
mem brane. Tiny nu tri ent mol e cu les dead plant and an i mal mat ter, con -
en ter the cell through pores on the vert ing them in to ba sic "raw" chem i -
sur face of this mem brane, through cal com pounds that liv ing or gan -
which larg er mol e cu les can not pass. isms can re use. Some bac te ria in -
Inside the mem brane is a soft, crease the fer til i ty of the soil. Others
gel a tin-like sub stance called cy to - con vert milk in to cheese, pro duce
plasm, which con tain pro teins called an ti bi ot ics for use against oth er
en zymes. These pro vide the cell with harm ful bac te ria, and syn the size vi -
the raw ma te ri als it needs by break - ta mins.
These are on ly a few of the count -
less pur pos es that bac te ria serve. A
Despite be ing very small
and sin gle-celled, bac te - close look at these bac te ria's ge net ic
ria have a very com plex
struc ture shows that they are not
struc ture.
sim ple life forms at all.
Besides all their hun dreds of
char ac ter is tics, bac te ria con tain the
DNA that is ev i dence of cre a tion. In
the ta-x-174, the small est known bac -
te ria, there are 5375 nu cle ot i des—the
Harun Yahya - Adnan Oktar