ANSWER: Carbon Dioxide
-Coal actually burns more than one gas, but out of all the choices, Carbon Dioxide is the only one that's true.
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The leaching of nitrates into terrestrial ecosystems.
The proteins encoded by genes within the same gene family have modularity if structure because : ( D ) gene families usually have similar DNA sequences and therefore similar protein structure.
A gene family is a set of similar genes that is formed by the duplication of single original gene, which has a similar biochemical function. natural selection affects the increase or decrease of a gene family.
Gene families have similar DNA sequence because the genes found in a gene family is from an ancestral gene, also their protein structure is similar
Hence we can conclude that gene families usually have similar DNA sequences and therefore similar protein structure.
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Water is an abiotic factor
