Emerald can be described as a transparent, green coloured gem stone made up of mineral beryl together with trace amount of chromium or sometimes vanadium having chemical formula as 
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What is the
significant of Emerald ?</h3>
Through time, the emerald has been known as a symbol of truth and love.
In ancient Greece and Rome, emerald was said to be the gemstone of the goddess Venus, purveyor of love and hope.
On the other side of the world, emeralds were revered by the Incas and believed by the Egyptians to be a source of eternal life.
Learn more about Gem stones here ;
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Answer:
The correct answer is a. mixing a heat killed pathogenic strain of bacteria with a living non pathogenic strain can convert some of the living cells into the pathogenic form.
Explanation:
Griffith proved that DNA is the genetic material in some organism.To do this he described the process of transformation in which the heat killed pathogenic bacteria when mixed with a non pathogenic bacteria can convert the non pathogenic strain into pathogenic one. This principle is called transformation.
The transformation of non pathogenic strain into pathogenic one occur due to the uptake of DNA of the heat killed pathogenic bacteria by the non pathogenic strain.
Transgender means that you got a gender change.
