Which structural characteristic is seen in rna but not in dna?
double strands
a single strand
chains of nucleotides
a helical shape

RNA is single-stranded

answer; a male inherits only one allele of the x-linked gene controlling hair color;

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.