A student is reading about a scientific claim in a newspaper article. The article includes a table of data that supports the claim.
To best assess whether the claim is valid, which is one question she should ask?
• Where did the data come from?
• Why was the data displayed in a table?
• How does the claim relate to her?
• How long did it take to develop the claim?

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.

b brown mice / white sand dunes

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)]