In the dna helix, which part of the nucleotide forms the sides of the ladder, the backbone? a. pentose sugar and nitrogen base b. phosphate group and carboxylic acid c. pentose sugar and phosphate group d. nitrogen base and carboxylic acid

The response is C. Pentose sugar and Phosphate group

Explanation:

The backbone of the DNA helix is formed by phosphate groups and sugars that are connected by phosphodiester bonds. The four (4) nitrogen bases are localized in the center of the DNA helix, where Adenine pairs with guanine, and thymine with cytosine

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

idk im sorry.