. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. 46 ELEMENTS OF BIOLOGY METABOLISM IN ANIMAL CELL. FROM AIR ANIMAL RESPIRATION PLANT CARBO - HYDRATE PLANT METABOLISM PHOTO- SrNTHESIS Fig. 10.—The carbon cycle. A scheme to illustrate the sequence in the utilization of carbon in the metabolism of plants and animals. One Cell and Many Cell Organisms. We have noted that living objects may be grouped into two great kingdoms, Plant and Animal. An examination of the structure o£ animals reveals that there are two widely different types of organiza
. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. 46 ELEMENTS OF BIOLOGY METABOLISM IN ANIMAL CELL. FROM AIR ANIMAL RESPIRATION PLANT CARBO - HYDRATE PLANT METABOLISM PHOTO- SrNTHESIS Fig. 10.—The carbon cycle. A scheme to illustrate the sequence in the utilization of carbon in the metabolism of plants and animals. One Cell and Many Cell Organisms. We have noted that living objects may be grouped into two great kingdoms, Plant and Animal. An examination of the structure o£ animals reveals that there are two widely different types of organization. Some animals consist of a single cell or cells arranged as colonies. On the basis of this common simplicity of cellular structure these are for conven- ience in study grouped together as a sub-kingdom, and collectively termed the protozoa. Animals consisting of many cells of different sorts and functions are grouped as another sub-kingdom named METAZOA. Single-cell and similarly simple plants are placed in a plant sub-kingdom, the protophyta. Plants consisting of many cells organized into special working groups are included in a second sub-kingdom, the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Buchanan, James William, 1888-. New York, London, Harper & brothers
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