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Originally Posted by VEGANGELICA
Hello kayleigh, I would say that with humans it begins with sex and that a new individual forming is more like an avalanche than jumpstarting a car. Once an egg and sperm cell...both individual, free-living cells...unite to form a single cell (kind of like the reverse of eating!), the cell divides to form two cells, and each of those divide, and so on and so on....like a tumor, but with organized structures. I view there as being no "beginning" of a human because the egg and sperm that united to become what would grow into me were also "me" in the sense that they were alive and I continue their life. Many embryos (perhaps 1/3rd, I recall reading) have defects causing them to die before a person even realizes she is pregnant. When you ask about how a human works, do you mean you are interested in how all the embryonic cells divide and move around to create the different parts of a baby human?
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no its not that, ive learned all that
, its what drives the body to actually work. what is there, that makes the body does what it does, its hard to explain, once i find the right words i will come back cos its crossing wires right now
Quote:
Originally Posted by dollarsandcents
Just to nitpick, A (adenine) is complementary to T (thymine) and G (guanine) is complementary to C (cytosine). Triplets of these also code for amino acids, which in turn generate chains of protein with specific structures related to their function. Just to elaborate.
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show off! im surprised you never mentioned the replacement of Thymine by Uracil in RNA
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