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Gram staining is a common technique used to differentiate two large groups of bacteria based on their different cell wall constituents. The Gram stain procedure distinguishes between Gram positive and Gram negative groups by coloring these cells red or violet.
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It is necessary to classify organisms because:
- Classification allows us to understand diversity better.
- It helps in the identification of living organisms as well as in understanding the diversity of living organisms.
- Classification helps us to learn about different kinds of plants and animals, their features, similarities and differences.
- It enables us to understand how complex organisms evolve from simpler organisms.
- To understand and study the features, similarities and differences between different living organisms, they are grouped under different categories.
- Classification is a tool which helps us to deal with a great diversity of living forms.
- It is essential to understand the inter-relationships among the different groups of organisms.
- Classification forms a base for the development of other biological sciences.
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If we have fever, headache, stomachache, loose motions, cough and sneeze etc we feel weak. Then we would have chan that we are sick and ought to see a doctor. If only one of these symptoms were present we should still go to see the doctor. Any of these symptoms may be initial signs of a severe disease.
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Sia ? 5 years, 11 months ago
We have the third equation of motion as,
v2 = U2 + 2aS
Where,
v is the final velocity,
S is said to be as displacement of the particle,
u is the initial velocity,
a = acceleration (constant),
At t = 0 sec, u is the initial velocity of the particle.
At t = t sec, v is the final velocity of the particle.
Now, if we draw the graph for the above set of statements then, from the graph we have,
(Displacement)S = Area of Rectangle + Area of Triangle
{tex}S=\frac{u t+1}{2(v-u)(t)}{/tex} .........eqn1
From the first equation of motion we have {tex}t=\frac {(v-u)}{a}{/tex}
Now let us substitute the value of t in eqn 1
{tex}S=u\left(\frac{v-u}{a}\right)+\frac{\frac{1}{2}((v-u)(v-u))}{a}{/tex}
By simplifying and rearranging the terms,
We get the expression as
v2 = u2 + 2aS = third equation of motion.
Hence the third equation of motion is proved with the help of graphical method.
3Thank You