Symbiotic Biological Nitrogen Fixation Video Lecture | Biology for Grade 11

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now we will talk in detail about the
symbiotic biological nitrogen fixation
because we want to understand the
process how exactly the nitrogen
fixation will take place now in order to
do that let us do a quick recap of the
process of symbiosis if you remember it
it is perfectly fine in case you have
forgotten it it is a quick review for
you so what are some biases let us have
a quick recap of some biases as the name
says same biases so the word Simmons
together by all means life so together
is living so when two organisms live
together for their mutual benefit that
is known as that Association is drawn as
symbiosis
so it is an association between two or
more species there one or both are
mutually benefiting for example on the
screen you can see a honey bee and a
flower
so here the honey bee is benefited
because it gets the nectar from the
flower so it is getting its food from
the flower and how is the flower
benefitted the flower is being pointed
pollinated by the honey bee so both of
them are mutually benefitted and that is
why this association is known as same
biases now some of the examples of
symbiotic relationships are the Buffalo
with these birds on their back you will
see most of the time the crows sit on
the Buffalo why because the crows e-up
the insects which are present on the
body of the Buffalo so the crew is
getting its food and the Buffalo is
getting benefitted because it gets rid
of those insects from its skin the
flower and the honeybee again a man and
his dog so the dog is getting all the
food and whatever it needs from the
person and the person is getting by
defeated because dog being a faithful
we'll protect him bacteria present
inside the human body for example in our
intestine you might see there were so
many small microorganisms present there
so they take their food and nutrients
from our body and how are we benefited
benefited in the sense it is not always
positive it might be negative aspect for
example these bacteria can cause
infection they can cause problems as
well again when one of the very common
examples of some vices is the lichen
that is a symbiotic association between
algae and fungi so they're also the
algae prepares food for the fungi and
the fungi provides a shelter to the ally
so these are some of the examples of
symbiotic relationships so on several
lines now we are going to talk about
symbiotic biological nitrogen fixation
as I said the process of nitrogen
fixation is all about converting that
mysteric nitrogen into ammonia but that
is done by the native organisms
therefore it is biological now it is
done by organisms which share symbiotic
relationship with another organism so
that is why it is symbiotic as well so
here we will talk about the association
between the bacteria Rhizobium and the
roots of leg 2 - plants so this is a
symbiotic relationship Rhizobium and
roots of lake- plants and they also help
in nitrogen fixation so we will see how
exactly the process of nitrogen fixation
take place so during the course of this
process nitrogen fixing nonhumans are
formed and that is a very important part
how this nodule formation take place we
have to understand that very clearly so
this is how it looks like so if you look
at the root of an a humanist plant for
example any plant you talk about P beans
lentils so all of them will have legumes
on their roots I mean how are the roots
normally like so the roots no I when you
look like this right this is how they
look like but for the like you
Glantz if you look at the roots you will
have swollen structures like this and
these swollen structures are point
nodules so here you can see this wall
instructions like this so these
structures are nodules
so these modules are spherical swollen
out growths on roots and how they are
formed that we will discuss very soon so
this is also a picture which actually
shows the presence of nodules
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