Hair and nails are derived from cells of the
a. skin.
b. bone.
c. blood.
d. fat tissu

A3-year-old child with nephrotic syndrome has been receiving prednisone for 1 week. the nurse reviews the child's progress record and determines that the medication has been effective. what information supports this conclusion? select all that apply.

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen