The reading and the listening both discuses the identification of the fossil remains of Tyrannosaurus rex (T. rex). The article states the three postulates to provide the shreds of evidence that tissue remails of 70-million-year old T. rex were discovered from the fossils of the leg bone, however, the lecture refutes all the three points and claims that these fossil findings are skeptical by presenting counter-arguments for each of the assertions.
First and foremost, the passage begins by asserting that the presence of hollows indicates blood vessels' presence which is further confirmed by the discovery of a soft organic substance inside the leg bone of T- rex. . This claim is challenged by the lecture by pointing out that it could be anything else other than blood vessels and elaborates this by arguing that long after the animals died, bacteria colonized in the hollows. These bacterias left behind traces of soft organic residue and that is misunderstood with the organic contents of blood vessels.
Next, the professor in the lecture rejects the second argument about dark red spheres by illustrating a couple of facts. First, If the spheres were red blood cells then all the primitive animals whose remains were found from the same place would have the red blood cells, whereas those primitive animals had not developed red blood cells. Second, these spheres were of different origins and were reddish probably because of some reddish minerals. These points refute the writer's implication that red spheres presented the identification of red blood cells as RBCs carry oxygen to tissues and, therefore, they are dark red colored too.
Ultimately, the article wraps its arguments by declaring that a test revealed the presence of collagen fibers in T-rex which is a characteristic feature of bone tissue. The speaker in the listening rebuts this reason by insisting that collagen fiber would not have lasted for more than 100, 000 years whereas the T_rex fossil appeared to be 70-million years old. Hence, it couldn't be from T-rex leg bone and probably it had come from the skin tissue of a scientist who was experimenting on T-rex.
The reading and the listening both discuses the identification of the
fossil
remains of Tyrannosaurus
rex
(T.
rex
). The article states the three postulates to provide the shreds of evidence that
tissue
remails
of 70-million-year
old
T.
rex
were discovered
from the
fossils
of the leg
bone
,
however
, the lecture refutes all the three points and claims that these
fossil
findings are skeptical by presenting counter-arguments for each of the assertions.
First
and foremost, the passage
begins
by asserting that the presence of hollows indicates
blood
vessels' presence which is
further
confirmed by the discovery of a soft organic substance inside the leg
bone
of T-
rex
.
.
This claim
is challenged
by the lecture by pointing out that it could be anything else other than
blood
vessels and elaborates this by arguing that long after the animals
died
, bacteria colonized in the hollows. These
bacterias
left
behind traces of soft organic residue and
that is
misunderstood with the organic contents of
blood
vessels.
Next
, the professor in the lecture rejects the second argument about dark
red
spheres
by illustrating a couple of facts.
First
, If the
spheres
were
red
blood
cells
then all the primitive animals whose remains
were found
from the same place would have the
red
blood
cells
, whereas those primitive animals had not developed
red
blood
cells
. Second, these
spheres
were of
different
origins and were reddish
probably
because
of
some
reddish minerals. These points refute the writer's implication that
red
spheres
presented the identification of
red
blood
cells
as
RBCs
carry oxygen to
tissues
and,
therefore
, they are dark
red
colored too.
Ultimately
, the article wraps its arguments by declaring that a
test
revealed the presence of collagen fibers in
T-rex
which is a characteristic feature of
bone
tissue
. The speaker in the listening rebuts this reason by insisting that collagen fiber would not have lasted for more than 100, 000 years whereas the
T_rex
fossil
appeared to be 70-million years
old
.
Hence
, it couldn't be from
T-rex
leg
bone
and
probably
it had
come
from the skin
tissue
of a scientist who was experimenting on
T-rex
.