Both the reading and lecturer are about a new discovered fossil which includes some actual tissues of the animal. The mentioned animal is Tyrannosaurus rex. In the research, scientists could find some worthwhile minerals inside T. rex's leg bone such as blood vessels, red cells and collagen. The article provides three reasons to support these findings. The lecturer casts doubt on the claims made in the article and finds all of them dubious.
First of all, the author of reading declares that researchers recognized some small branching channels inside leg bone of T. rex which were similar to blood vessels in bones and its hollows, meanwhile they could explore a soft, flexible substance into of channels and they predicted that the aforementioned substance may have been remains of real blood vessels. This point is challenged by the professor and he points out that a soft substance is not blood necessarily. After a live organism dies up, the bacteria would colonize inside its bones and hollows; hence, these remains may be a trace of their activities.
Secondly, the article contends that several spheres were found in the T. rexs' bone; therefore, they could have been red blood cells. Furthermore, these spheres were in the size of red cells and also they had iron which is crucial for transporting oxygen to tissues; conversely, the lecturer claims that scholars discovered plentiful of other animals' fossil at the same place - which they did not have any red cell when they were alive- with these same spheres; thus, the mentioned spheres must have had another origin such as reddish minerals.
Finally, the reading passage states that collagen which is a kind of fibrous protein was found in T. rex's bone. This argument is rebutted by the lecturer and he poses that we know that collagen would not last more than 100 years; however, T. rex's bone belongs 70-million years ago. There is a possibility that collagen has been transported to bone by researchers' hand.
Both the reading and
lecturer
are about a new discovered fossil which includes
some
actual tissues of the animal. The mentioned animal is Tyrannosaurus
rex
. In the research, scientists could find
some
worthwhile minerals inside T.
rex
's leg
bone
such as
blood
vessels,
red
cells
and collagen. The article provides three reasons to support these findings. The
lecturer
casts doubt on the claims made in the article and finds all of them dubious.
First of all
, the author of reading declares that researchers recognized
some
small
branching channels inside leg
bone
of T.
rex
which were similar to
blood
vessels in
bones
and its hollows, meanwhile they could explore a soft, flexible substance into of
channels and
they predicted that the aforementioned substance may have been remains of real
blood
vessels. This point
is challenged
by the
professor and
he points out that a soft substance is not
blood
necessarily
. After a
live
organism
dies
up, the bacteria would colonize inside its
bones
and hollows;
hence
, these remains may be a trace of their activities.
Secondly
, the article contends that several
spheres
were found
in the T.
rexs
'
bone
;
therefore
, they could have been
red
blood
cells
.
Furthermore
, these
spheres
were in the size of
red
cells
and
also
they had iron which is crucial for transporting oxygen to tissues;
conversely
, the
lecturer
claims that scholars discovered plentiful of other animals' fossil at the same place
-
which they did not have any
red
cell
when they were alive- with these same
spheres
;
thus
, the mentioned
spheres
must
have had another origin such as reddish minerals.
Finally
, the reading passage states that collagen which is a kind of fibrous protein
was found
in T.
rex
's
bone
. This argument
is rebutted
by the
lecturer and
he poses that we know that collagen would not last more than 100 years;
however
, T.
rex
's
bone
belongs 70-million years ago. There is a possibility that collagen has
been transported
to
bone
by researchers' hand.