The Theory of Evolution (continued) 58 – The Evidence from Embryology 58 – – The Recapitulation Theory 58 – Conclusions 84 Between an organism and its environment there takes place a constant interchange of energy and of material. This is, in general, also true for all bodies whether living or lifeless; but in the living organism this relation is a peculiar one; first, because the plant or the animal is so constructed that it is suited to a particular set of physical conditions, and, second, because it may so respond to a change in the outer world that it further adjusts itself to changing conditions, _i.e._ the response may be of such a kind that it better insures the existence of the indi…
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