. Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals . in this earth epoch,may they not have beenin earlier ages? Geologistsand biologists attempt toexplain most of the thingsthat happened in earliergeologic ages by what theyobserve to be happeningnow. They would answer,on this basis, that whatevidence we now haveshould lead us to believe that the generation of life has never occurred. But there musthave been a beginning. Life has not always been. The ac-cepted geological theory of the making of our earth pre
. Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals . in this earth epoch,may they not have beenin earlier ages? Geologistsand biologists attempt toexplain most of the thingsthat happened in earliergeologic ages by what theyobserve to be happeningnow. They would answer,on this basis, that whatevidence we now haveshould lead us to believe that the generation of life has never occurred. But there musthave been a beginning. Life has not always been. The ac-cepted geological theory of the making of our earth precludesthe existence of life on it until the globe was cool enough fororganisms to exist. We know that there is a maximum oftemperature beyond which protoplasm inevitably and where was this beginning of life? The biologist can-not admit spontaneous generation in the face of the scientificevidence he has. On the other hand he has difficulty in under-standing how life could have originated in any other way thanthrough some sort of transformation from inorganic a matter of curiosity we may glance at a few of the. FIG. 32.—Ascidian or sea squirt. LIFE, ITS PHYSICAL BASIS AND SIMPLEST EXPRESSION 43
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