DNA. What is it made of? How does it makes us what we are? How and why do we share the same DNA with animals, plants, fruits, etc. ?
In: Biology
To answer your last question… lots and lots and lots of our DNA is just to make each cell. Like, most of our DNA. In fact, single-celled life evolved for about *1 billion years* before the first multicellular… anything appeared. That’s 1 billion years of evolution just to get individual cells to function on a complex level. Once you have those cells, you can build them into any shape pretty easily.
So, a human and a lizard both have muscles and bones and blood and neurons and nerves that are all very similar… every cell of every animal has the same set of organs, gets energy from fuel and oxygen in the same way, and has a cell wall made of the same stuff… even between you and a banana there’s a ton of shared DNA that’s all wrapped up in some basic functioning of individual cells.
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