Which plane of reference would always divide a four-legged animal into two equal halves that are mirror
images of each other?
a. frontal
b. transverse
c. sagittal
d. median

D. Median

Explanation:

Median Plane: A special kind of sagittal plane that runs down the center of the body lengthwise and divides it into equal left and right halves. It could also be called a midsagittal plane, but that term is not commonly used.

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.

there really is life in the deepest part