All of the following are problems that growth causes for cells a) more demands on dna b) excess oxygen c) obtaining enough food d) expelling wastes

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the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides