For a mutation to be evolutionarily significant, it must — have a neutral effect on an organism
⊝

cause the loss of a gene
⊝

provide a survival advantage to the species
⊝

change the type of protein being produced

the concept of nucleosome occupancy, which reflects the fraction of cells from the population in which a given region of dna is occupied by a histone octamer

it would be c. xylem.

bc blah

explanation:

bc blah

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.