Ted spent half of his weekly allowance playing arcade games. To earn some more money his parents let him wash the car for $7. What is his weekly allowance if he ended with $14? His allowance is $ .

d. the weight of the book

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)]

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?