Which geologic feature forms when tectonic plates collide? A
buttes

B
valleys

C
sinkholes

D
mountains

D. Mountains

Explanation:

Sinkholes are caused by cave ins, valleys are in between mountains, and buttes are most likely caused by erosion after the sand and soil got blown away. Mountains are caused by two plates slamming into each other and going sky-wise.

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.

thinking it would be physical characteristics