The emission of N2O from the landfill site is called denitrification and it is caused by the action of denitrifying bacteria.
<h3>What is dissolved oxygen?</h3>
The term dissolved oxygen refers to the amount of oxygen that is present in a water body. Now, we know that the addition of organic matter into water requires oxygen to break it own thus the dissolved oxygen content will go down in response to the added organic load.
The process that leads to the emission of N2O from the landfill site is called denitrification and it is caused by the action of denitrifying bacteria.
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Answer:
The correct answer is c. cell fractionation
Explanation:
Cell fractionation is the technique which allows different cells part to be separated from each other on the basis of their density gradient by using a centrifuge.
In cell fractionation, first the cell wall and membrane of cells are broken by chemical, physical or mechanical method. Then the cell component can be separated by centrifuging them at different rpm.
Components that have higher density can be found in the bottom and the light density can be found on top of the tube. Therefore the correct answer is c. cell fractionation.
Answer:
Animals on Earth
Explanation:
The Cambrian explosion is referred to an event which took place in the past around 530 million years ago on the Earth.
Since the event took place in the Cambrian period of the geological time scale and lead to the evolution of the diverse forms of life or organism on Earth which looked like an explosion of the species on Earth, therefore, called the Cambrian explosion.
The Explosion took place due to the evolution of a new gas called the oxygen during this period by the green bacteria which led to the formation of the diversity of animals on Earth which could absorb the Oxygen.
Thus, the first animal on Earth is correct.
Vitamins play a vital role in helping the chemical reactions of the body to occur, besides being important for overall well-being, growth, and development of the body. They help in building the parts of the body like teeth, muscles, and also help in absorbing certain important elements like iron etc.