How do main organs of the excretory system get rid of wastes?

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Apea plant that is heterozygous for the tall phenotype can produce short offspring when self pollinating. which of the following explains why this occurs? a. segregation of allels b. condominance of traits c. polygenic expression of traits d. independent assortment of alleles