Sponges, members of the porifera, might be the simplest multicellular animals on earth. they do not have any tissues, organs, or organ systems. in order for sponges to have evolved, what must have happened first? a) the organization of cells into groups b) symbiotic relationships among various cells c) the evolution of cells with nuclei and organelles d) the development of the cell wall as a protective mechanism
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Ответ:
C
Explanation:
i just did it
Ответ:
C)the evolution of cells with nuclei and organelles
Explanation:
Sponges are eukaryotes and have well define membrane bound nucleus and organelles in their cells. They lack tissues and hence, do not need organization of cells into groups. Evolution of sponges would require origin of eukaryotic cells from the ancestral cells. Being animals, they lack cell wall around their cells.
Ответ: