The answer is D its tightly packed cells allow for proctection against harmful substances.
MUTATIONS lead to duplications actually increase the number of genes in a genome.
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Disaccharides are formed when 2 sugar molecules combine. An example of this is Maltose
Answer:toxic
Explanation:
A ureotelic organism excretes excess nitrogen as urea. Urea is less toxic and needs less water in comparison to Ammonia. Ureotelic organisms include cartilaginous fish, few bony fishes, adult amphibians and mammals including humans. The uricotelic organism excretes uric acid or its salts
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