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Biology
Camouflage is a self- depend method of
creatures to escape from predators by
changing colour of their bodies to blend in
with their environment.In the listening, the professor is
discussing how the cuttle fish changes its
colour to camouflage itself. It does this by
using various pigments in its body to hide
from potential enemies. This is a common
method of self protection that can be found
not only in cuttle fish but also in other
species of fish
According to reading, humans require a
right amount of sleep to maintain cognitive
function of their brains.
In the listening, the professor takes an
example as to how sleep is important to
humands. He refers to a test in which the
study subject was required to type a chain
of number over and over again on a
keyboard. Those who get 8 hours of sleep
was very accurate in typing that chain ofnumber but only in the morning and less
accurate in the afternoon. They also did
poorly when they also get about 4 hours of
night sleep. An average man require 6 to 8
hours of sleep everyday or else that person
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cog native function will suffer.
According to the reading, ecosystem is a
group of both living and non-living entities
that forms various inter-relationship.
In the listening, the professor is
discussing an oil spill in the Great Barrier
Reef. The oil killed countless fish which in
turn decompose and turn into angy. The
angy could have killed the reef because
they block the sunlight but there was the
fish. In the reef that ate all of the excess
angy just saving the reef in there.
This example shows how ecosystem
inter-relates and because the life cycle of
the reef was not broken if didnt die in
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constract it propers as the can be seen from
the reading.
According to the reading , symbiosis is
the relationship between two different
organisms living together in which at least
either benefits from the relationship.
In the listening, the clown fish lives in
the tentacles of the sea anemone and
protects them from protential predators.
The sea enomone can use its tentacles to
sting fish. But the clawn fish adapts to
those by a kind of new mucus on its body.
This is a symbiosis relationship because
the two species live together and the sea
enomies really benefits from that
relationship.
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According to the reading, eusocial
species is able to produce sterile member
that perform various tasks for the
productive member.
In the listening, the professor is
discussing termite as an example of
eusocial. Termites organizes themselves
into sterile and fertile members. Sterile
members are worker and soldier. While the
productive members are the queens and
pertile males. Termites are eusociality
because they genetically differentiated into
both sterile and fertile members. The sterile
members perform specific tasks to serve
the productive members of the swam.
According to the reading, mimicry is the
ability of animal to appear to be other thing
or organisms to deceive both predators andpreys.
In the listening, the professor refers to
mimicry of both stick and leaf insects. The
stick insect looks just like a stick from a
plant on tree. And the leaf insect appears
seems to be a leaf from a tree going in its
surrounding. Both these insects resort to
mimicry to plain in with their environment
there by hiding from their predators that
might otherwise have eaten them.
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