B. Histones is the correct answer.
The answer is D. This is an exmaple of incomplete dominance. Red and blue make purple. Because there is no purple alleles, C is false. Because there you can only have 2 alleles total B is false. A is false because having two red alleles makes a red flower.
Biome, though some might say ecosystem instead. Biomes are very large ecosystems that cover broad areas.<span>If they specify "one" reef, then they are probably looking for "ecosystem"</span>
Incomplete dominance, it r<span>efers to a genetic situation in which one allele does not completely </span>dominate<span> another allele, and therefore results in a new phenotype.</span>
