If you are wearing shell jewelry, it likely came from
a) cnidarians: jellyfish
b) platyhelminthes: flat worms
c) nemotoda: round worms
d) mollusca: mollusks
e) annelida: segmented worms

What is the function of the somatic nervous system? connects the brain and the spinal cord to the rest of the body carry signals to the muscles and glands includes all nerves controlling the muscular system and external sensory receptors controls internal organs like the heart and bladder

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.