Which example is always single stranded?

dna

mrna

dsrna

dna and rna

The correct answer is mRNA

Explanation:

RNA m corresponds to a single nucleotide chain molecule, which is complementary to the DNA chain of a particular gene.

answer; i believe that the correct answer is (lung);

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."