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Answer:
The nasal cavity and its mucous have two primary purposes in the process of breathing: Role as a Passage for Inhaled Air: During inhalation, air enters through the nostrils and passes via the nasal cavity into the pharynx and larynx, the next sections in the respiratory tract, to eventually reach the lungs.
Explanation:
Genetic. And it allows for more fish to be created and living freely
I think it's D because I suppose that 'all its chromosomes' equals diploid