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Engineering HSC and IIT-JEE Mains and
Advanced videos. Hello students today we
are starting chapter plant growth and
development in that we are studying
growth rate.
now when a plan growth actually basically if we
see the outer growth of the plant we see
that plant has completely moved but this
outer both can be expressed
mathematically yes
math can help us to explain how does a
plant growth.
growth rate the increased growth per
unit time is termed as growth rate
without of maths we can tell whether a
plant text growing or not
yes max can tell us whether a plant is
growing there are equations present in
maths the growth of the plant can be
defined mathematically in two different
ways first is arthomatic maybe and the
second is the geometric wings now
arthomatic progression of growth is
exhibited or we can say a plant has
grown arthomatically if there is a
mitotic division the division in the
somatic cells only in the dot essence of
the plans now mitotic division self
continuous divisions that happen in the
plant this divisions happen in somatic
cells for example in the leaf cell in
the stem cells this also met excels and
mitotic division which is an equation 11
will be happening continuously this all
sums up automatic progression now does
geometric progression so method
prevention is similar to geometry it has
got something with the shape geometric
growth rate represents a typical
s-shaped curve in geometric progression
if you say a plant has grown it should
follow four phases and those reasons are
lack phase lock face stationary phase
and death phase now what do what do by
lag phase log phase stationary phase and
death phase lag phase is the starting
phase when a plant is a seed just the
start of the plant is like this log
phase is a phase when the plant is
dividing mitosis meiosis is at the peak
the plant is taking nutrients from the
soil and it is cool stationary phase is
the phase where the plant is completely
grown and then comes the death phase by
the plant dies
the growth rate of a plant is the
increased growth per unit time at every
moment
when the plant is increasing it is
termed as growth rate now growth rate
can be expressed my Kennedy mechanically
just by seeing visually we can say that
the tightest cobertura mechanical ways
or you can say mathematical equations to
prove that a plant is coming crew three
mathematically can be divided into two
types automatic operation and geometric
progression
the two phases of growth rate are
automatic automatic progression of
growth is exhibited by mitotic division
of somatic cell division or you can say
equation elevation in only daughter
cells which continue to grow
whereas geometric mean so metric Ruth
red is represented by typical s-save
curved or si growth curve exhibiting
four different phases like face lock
face stationary phase and the death
phase basically the production implants
happen in different number of it the
most commonly known days are sexual
reproduction and/or sexual reproduction
now implants there is something called
as vegetative reproduction when I say
vegetative reproduction it means taking
one part of the plant and reproducing it
from any part of the time you can grow
the whole plant that is vegetative
reproduction there are other means of
reproduction so grafting
micropropagation in tissue culture now
all these methods of reproduction can be
judged using this mathematical equation
that is automatic profession this
geometric progression so students in
this part of the chapter we have studied
how max can help us decide whether the
plant is growing or not isn't it
interesting to know that max and biology
can be combined together to study plant
growth I hope you all are clear about
these two types of progression thank you
