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Originally Posted by SinJin  Here's my question- where does life come from? Not in the general sense, but specifically, how does life seemingly grow from nothing? For instance, if you look at a seed, it is much smaller compared to, say, the oak tree it will grow into. So where does the extra matter come from that builds the tiny seed into a giant tree? Same thing with animals. A human embryo is pretty small, and it seems like it magically grows into an adult human. Does the input of food and water equal the amount of growth? Does the body convert energy into matter? Does my question make any sense? Any thoughts and/or answers? |
The matter doesnt come out of nothing. The organisms are just assimilating other substances with the help of light (plants, autotroph) or burning the sugar from the plants (heterotroph, animals etc.). This means that, with the help of enzymes, the organism separates the big molecules into smaller ones and builds a new ones, the ones he needs, out of it. Like with LEGO when you destroy your police station and build a school out of it. And when you get more and more Lego stones to it (here the food) your bulding gets bigger and bigger (the organism)
The energy comes all from the sun - the plants use it directly, the animals indirectly by consuming the plants' sugar. As you probably know chemical reactions can be endotherm and "exotherm" - thats were the energy comes from. look up cictrat cycle (not sure if thats correct in english). And yes all the matter all organisms are made of comes from the earth (for plants the salts etc.) and from the food (animals)
regards Thomas
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