Chemical News and Journal of Industrial Science, Tom 145,Wydanie 3776Chemical news office., 1932 |
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Strona 114
... usually unsegmented , bilaterally symmetrical , wider than deep , rounded , usually separate , occasionally associated in chain - like colonies , forming three embryonic layers ( ectoderm , endoderm and mesoderm ) of which the mesoderm ...
... usually unsegmented , bilaterally symmetrical , wider than deep , rounded , usually separate , occasionally associated in chain - like colonies , forming three embryonic layers ( ectoderm , endoderm and mesoderm ) of which the mesoderm ...
Strona 115
... usually as quite distinct individuals , sometimes attached by a se- creted stalk ( byssus ) but often moving by means of a tongue - like foot , or swimming actively in various ways , developing from three primary embryonic layers of ...
... usually as quite distinct individuals , sometimes attached by a se- creted stalk ( byssus ) but often moving by means of a tongue - like foot , or swimming actively in various ways , developing from three primary embryonic layers of ...
Strona 118
... usually furry coat , teeth confined to jaws , limited in number and differentiated into incisors , canines , premolars and molars , endoskeleton passing through the notochordal and cartil- aginous stages to form the fully developed bone ...
... usually furry coat , teeth confined to jaws , limited in number and differentiated into incisors , canines , premolars and molars , endoskeleton passing through the notochordal and cartil- aginous stages to form the fully developed bone ...
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added adult alimentary canal analogy analysis animals Applications arranged atom becoming bilateral Black blastopore body bone British Canada carbon cavities character Chemical chemistry circulatory system clearly cœlom compared conception consider constructed containing definite described developed discoveries distinct dominant dorsal Drebbel ducts element embryo exact excretory experiments external extract force fundamental gills give given groups gypsum head heart higher ideas important included industry interest internally known laboratory latter Lavoisier less light limbs London lungs malt material means ment mesoderm method molecule mouth muscle National Mark nature neck nervous system obtained opening organic molecule organs original pairs Paris passing Patent Phylum physical placenta plant position possible present Priestley primitive problem produce quantitative Ratio reproduction segments sense separate short skeleton sometimes stages structure substances tail tion trunk types urogenital usually various vegetative whole