The material discusses the existing of bees as early as 200 million years ago. While the reading looks at the topic from one perspective, the listening challenges certain points outlined in the reading passage.
Firstly, the reading details specific points regarding this topic, namely there are no bees' fossils dated back to 200 million years. Next, 200 million years ago there were no flowering plants, and there is a close relationship between them and bees. Finally, the resemble bee nests lack special caps.
Conversely, the lecture challenges the points, one specific contradiction, no bees' fossils remain because they could not be preserved. bees are reserved by using the sticky liquid from resin trees, 200 million years ago these trees were rare and they started to be common latter. As a result, the absence of fossils does not mean that bees did not exist, but there were no trees that could produce the right kind of resin. In addition to that, early bees might feed on other plants, such as pine trees, then after flower plants were evolved, bees started to adapt to them. One final point, bees built chambers and use special waterproof materials with a distinctive chemical composition, when they examined the nest chambers, they found that they have the same chemicals used by modern bees.
The material discusses the existing of bees as early as 200
million
years ago. While the reading looks at the topic from one perspective, the listening challenges certain
points
outlined in the reading passage.
Firstly
, the reading
details
specific
points
regarding this topic,
namely
there are no bees' fossils dated back to 200
million
years.
Next
, 200
million
years ago there were no flowering plants, and there is a close relationship between them and bees.
Finally
,
the resemble
bee nests lack special caps.
Conversely
, the lecture challenges the
points
, one specific contradiction, no bees' fossils remain
because
they could not
be preserved
.
bees
are reserved
by using the sticky liquid from resin
trees
, 200
million
years ago these
trees
were
rare and
they
started
to be common latter.
As a result
, the absence of fossils does not mean that bees did not exist,
but
there were no
trees
that could produce the right kind of resin.
In addition
to that, early bees might feed on other plants, such as pine
trees
, then after flower plants
were evolved
, bees
started
to adapt to them. One final
point
, bees built chambers and
use
special waterproof materials with a distinctive chemical composition, when they examined the nest chambers, they found that they have the same chemicals
used
by modern bees.