Cells that move throughout the sponge's body wall to deliver food to the organism's cells are1/31/2024 ![]() ![]() Aĭivision of labor is evident, so that some cells are concerned with, for example, Protoplasm is differentiated into organelles capable of carrying out specialized functions.Ĭellular organization is an aggregation of cells that are functionally differentiated. ![]() Units that make up tissues, Tissues are the units that make up organs, and Organs make up organĮach level is more complex than the one before and, as a general rule, a more recent evolutionaryĪll life functions are confined within the boundaries of a single cell. Molecules are the units of organelles, Organelles are the units that make up cells, Cells are the In the evolution of animals so that there is considerable specialization and division of labor withinīody tissues.Some of the trends seen in animal evolution are:Īn animal (or a plant for that matter) is composed of many units organized into successive units: In animal evolution, structural complexity has increased Early Animals The Evolution of Early Animal Complexity ![]()
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