Which of the following describes an allele whose characteristic phenotype is masked by the presence of a second, different allele?

What substance acts to prevent sudden ph changes in bodily fluids?

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?

Which of these would most likely be a stimulus that would cause the body to initiate feedback mechanisms a.) normal body temperature in an arctic environment b.) normal boy temperature in a tropical environment c.)light physical activity d.)low blood sugar