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A similar increase in contrast is noticeable in the chemical composition. Forwith few exceptions, the lowest animal and vegetable forms live in the water;water is a compound almost exclusive to them. DriedProtophyta and Protozoa turn into dust, and galef (sea nettle) onpound of water has several granov solids. Higher waterplants and animals having a greater resistance substances contain moreorganic elements and therefore more different chemicalits composition from the environment. Turning to the upper classesorganisms - plants and animals that inhabit the land, we note thatchemical composition, they have very little in common with the land on which theylive, and the air that surrounds them. The same is noticed in specific gravity. The simplest of shapes withdisputes and poczekaj higher forms have a specific gravity extremely close tothe specific gravity of the water in which they swim. And although we can not say thatwater organisms, with the highest specific gravity was higher in the otherrelations, however, we argue that higher order, exempt fromimpurities, regulating their specific gravity, specific weight its moredifferent from the water than the lower ones.
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