Which of the following is not an accessory digestive gland?

a. submandibular gland
b. pancreas
c. frenulum
d. liver

Which of the following is not am example of a polymer? protein nylon kevlar concreta

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.