Answer:
A
Explanation:
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Amino acids are the building blocks that make up proteins.
Combustion<span>, </span><span>a </span>chemical reaction<span> between substances, usually including </span>oxygen<span> and usually accompanied by the generation of </span>heat<span> and </span>light<span> in the form of </span>flame<span>. </span>
There are approximately 30 trillion cells present in the human body.
<h3>How many different kinds of cells are there in an adult human body?</h3>
Humans are intricate, multicellular entities. Our bodies contain "specialized" cells. This implies that every cell type has a distinct and important role. Because of this, each of the body's 200 different types of cells has a unique structure, size, shape, and function, as well as a variety of organelles.
Human cells are not the only ones in our bodies, of course. According to recent studies, the average human contains about 38 trillion bacteria. With this, the overall number of cells now exceeds 68 trillion (human or not).
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