Urea... A. Is the least expensive nitrogen end-product to produce B. Is the least toxic nitrogen end-product C. Is excreted by diffusion across the body surface or gill of aquatic animals D. Provides the greatest water savings (in terms of excretion of nitrogen waste products) E. None of the above

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Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.