译林版必修5 Unit3 Science and nature Welcome to the unit课件(43张PPT)

(共43张PPT)
Unit
3
Science
and
nature
Welcome
to
the
unit
To
get
a
general
idea
of
what
we
are
going
to
learn
in
this
unit
To
know
something
about
clone
To
learn
to
discuss
about
clone
or
cloned
animals
Do
you
think
the
fast
development
of
science
and
technology
has
been
good
for
nature?
Why
or
why
not?
How
should
science
and
nature
relate
to
each
other?
Do
you
think
that
human
beings
should
try
to
control
nature?
Should
we
do
anything
against
the
laws
of
nature?
Do
you
know
something
about
cloning
(克隆)?
Man
has
created
many
things
and
now
they
are
even
ready
to
recreate
themselves.
“Cloning”
is
a
new
biotechnology
(生物技术)
which
aims
to
produce
an
exact
copy
of
an
animal
or
a
plant
from
its
own
cells,
DNA
fragments
(片段)
or
organisms
(有机体)
in
an
asexual
(无性繁殖的)
way.
Cloned
animals
Dolly
and
its
creator
What
do
you
know
about
Dolly?
the
world’s
first
cloned
mammal
created
by
Scottish
scientists
in
1996
died
in
2003
because
of
lung
disease
many
countries
have
banned
human
cloning
since
Dolly’s
birth
Look
at
the
following
pictures
and
study
them.
Can
you
tell
what
is
the
main
feature
of
cloning?
Can
you
identify
the
differences
between
the
cloned
animals
and
normal
ones?
Dolly
is
together
with
her
mother.
What
do
you
know
about
Dolly?
the
world’s
first
cloned
mammal
created
by
Scottish
scientists
in
1996
sparked
worldwide
interest
and
concern
after
its
birth
many
countries,
including
Germany,
France,
Canada,
Switzerland,
Austria,
Norway
and
South
America,
have
banned
human
cloning
since
Dolly’s
birth
died
in
2003
because
of
lung
disease
The
kitten
in
the
picture
is
called
CC.
Its
name
is
from
“Copycat”.
It
was
born
in
December
2002.
The
researchers
in
Texas
produced
CC
with
a
cell
taken
from
her
mother
Rainbow.
CC
was
a
healthy
kitten
who
grew
into
a
lively
affectionate
house
cat.
She
is
not
the
exact
copy
of
her
clone-mother
because
they
grew
up
in
different
surroundings,
though
the
shared
the
same
genes.
These
female
pigs
are
also
cloned.
They
were
born
on
Christmas
Day
2001.
They
were
Noel,
Angel,
Star,
Joy
and
Mary.
Although
they
are
not
the
first
cloned
pigs,
they
are
actually
the
first
to
be
engineered
in
a
way
that
their
organs
more
suitable
for
transplantation
into
humans.
Due
to
the
shortage
of
human
organs
for
transplants,
many
people
are
dying
because
some
of
their
organs
do
not
work.
It
is
hoped
that
the
organs
from
these
pigs
will
be
used
in
human’s
bodies.
The
name
of
the
first
cloned
monkey
is
ANDi.
It
is
from
“inserted
DNA”
spelt
backwards.
The
playful
coffee-coloured
monkey
was
born
in
2000.
The
technology
is
different
from
that
used
for
Dolly.
Researchers
in
Oregon,
the
USA
created
this
first
genetically
modified
monkey
by
putting
a
gene
form
a
jellyfish,
another
species,
into
six-day-old
monkey
embryos
(胚胎).
From
the
appearance,
the
cloned
animals
are
exactly
the
same
as
the
original
ones.
However,
some
cloned
animals
were
reported
to
have
health
problems
and
died
usually
young.
The
pair
of
calves
were
born
on
5
July
1998
in
Ishikawa,
Japan.
They
were
two
years
younger
than
Dolly,
being
second
adult
animal
clones
in
the
world.
More
examples
about
cloned
animals
The
mule
in
the
picture
is
the
world’s
first
cloned
mule.
It
was
born
on
4
May
2003.
His
name
is
Idaho
Gem.
In
1962,
the
scientist
Gurdon
from
Cambridge
cloned
a
tadpole
In
1963,
Chinese
scientist
Tong
Dizhou
cloned
a
carp,
which
was
33
years
earlier
than
Dolly.
Born
in
2005
in
Seoul
University
in
Korea
Snoopy
What
do
you
think
of
the
new
kind
of
technology?
Does
it
have
any
advantages
or
disadvantages?
Advantages
of
cloning:
cure
many
genetic
diseases
save
people’s
lives
prevent
some
endangered
animals
from
dying
out
Disadvantages
of
cloning:
cause
ethical
problems
violate
(违背)
human
rights
violate
the
laws
of
nature
…
Do
you
think
it
would
be
a
good
idea
to
clone
humans
some
day?
Why
or
why
not?
It
is
a
good
idea
,
for…
reasons:
Cloning
can
help
cure
many
diseases
and
save
a
lot
of
people’s
lives.
2.
…
3.
…
Party
A
It
is
a
bad
idea,
for…
reasons:
Cloning
can
lead
to
ethical
(伦理)
problems.
2.
…
3.
…
Party
B
If
possible,
do
you
want
another
person
to
be
exactly
the
same
as
you?
Just
imagine
Supposing
you
are
facing
your
second
self
who
looks
like
you,
talks
like
you
and
thinks
like
you,
how
do
you
feel?
One
man,
one
world?
Funny
pictures
If
cloning
goes
in
a
wrong
direction,
what
will
happen?
A
dog
or
an
eagle?
A
duck
or
a
crocodile?
A
cock
or
a
dog?
A
lion
or
a
kangaroo?
A
frog
or
a
crocodile?
A
tortoise
or
a
bear?
A
bird
or
a
dog?
A
dog
or
a
man?
克隆如何才能和谐？
Think
about
what
we’ve
just
learnt
today.
Study
without
reflection
is
a
waste
of
time.
After
the
class
It’s
time
to
stop
the
class
for
you
to
look
back
in
silence.
Homework
Write
a
short
passage
about
whether
it
is
a
good
idea
to
clone
humans.
Today
our
class
had
a
discussion
about
whether
it
is
a
good
idea
to
clone
humans.
Some
students
think
that
it
is
good,
for…
However,
some
other
students
think
it
is
not
a
good
idea,
for…
In
my
opinion,
…