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NCERT Exemplar Solutions Class 7 Science Solutions for Transportation in Animals and Plants - Exercise in Chapter 11 - Transportation in Animals and Plants
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Paheli uprooted a rose plant from the soil. Most of the root tips, with root hairs, got left behind in the soil. She planted it in a pot with new soil and watered it regularly. Will the plant grow or die? Give a reason for your answer.
Answer:
Possible changes may take place
-Without root hairs roots cannot absorb water and nutrients hence plant will die.
-The stem of the rose plant may grow into new plants, hence plant survives.
-Rose plant may die when transferred to a new type of soil.
Video transcript
"hello everyone welcome to leto
this is priya and here we have a
question
about the structure of an atom let us
look into the question
draw a sketch of force model of an atom
with three shells so according to the
burst model
of an atom so bohr's atomic model
um so we see a nucleus
at the center at the center we see a
nucleus and this nucleus is made up of
protons and neutrons and around these
nucleus
we see the orbit so here you can see the
orbits
this is first orbit and this is the
second output and this is a
third orbit so orbit orbit
is a shell in which
electrons will revolve around this
nucleus
so each orbit or shell
has a fixed energy and these circular
orbits are known as orbital shells
and we call these each orbit shells as
orbital shells
and these the around these orbits only
the electrons are going to revolve
because of this
nucleus which is present at the center
of an
atom so coming to according to this poor
model
electrons travel in a circular orbit and
we call them as
orbital shells and orbits are labeled by
an integer
for example we call the first orbit as
k
we call this as k l
m and so on okay so first
first shell of an atom is called k
second shell
l and m so these orbitals can also be
represented as
n so first shell equal to n
n equals to
one second shell
n equal to two
third shell m
e n equal to 3 and so on so
in this way the first shell will be n
equal to 1
second shell n equal to 2 third shell n
equal to 3
and so on so depends on the number of
shells present in an atom according to
the according i called
atomic number and
each electron so one electron can jump
from
one orbit to the other of it using
are emitting energy so while one atom is
jumping from one shell to an electron is
jumping from one shell to
another shell so it absorbs energy
or emits energy so that's why we call
this
orbital shells as energy orbits also
because they will release energy while
an electron germs from
an orbital to the other orbital
so this is about the structure of an
atom according to the boost model hope
you understand this video if you like my
video please subscribe to our leader
channel
and if you have any doubts you can keep
a message in comment box
thank you
"
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