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The dissolved oxygen content in water
Cartilaginous fish do not contain any bones - their skeleton is made up of cartilage.
Answer:
Topsoil is the part of a soil profile that is made up of partly weathered rock.
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Dicots include annuals, biennials, vines, epiphytes (or air plants), parasitic plants, saprotrophs (such as mushrooms and molds) and aquatic plants. ... Microscopic pores on dicot leaf surfaces are usually scattered.