How does rna differ from dna?
a. rna contains uracil and deoxyribose
b. rna contains ribose and thymine
c. rna contains uracil and ribose
d. rna contains uracil, thymine, and ribose

a polymer is a chainlike molecule made up of small molecular units. these small molecular units are called monomers. monomers of polymer can be joined together either naturally or synthetically.  

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.