I will give brainliest

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

As a small change in a person's dna can cause a genetic disorder

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.