Q: Which system in your body stores urine and is controlled by the nervous system? Choices: - cardiovascular system - muscular system - digestive system - urinary system A:
urinary system

Q: Where does the heartbeat originate in vertebrates? Choices: - the tissue - the pulse - the blood - the heart A:
the heart

Q: Q: Nitrogen is a very important element to living things, because it is part of nucleotides and amino acids that are the building blocks of nucleic acids and these? Choices: - cells - lipids - follicles - proteins A:
A: proteins

Question: Q: What type of carbon dioxide levels have been rising for the past several decades? Choices: - magnetic - aqueous - subatomic - atmospheric A:
Answer: atmospheric

*Question*
Q: What is reduced and forms part of the gelatinous disks sandwiched between the vertebrae in humans? Choices: - the clavicle - the sacrum - the pelvis - the notochord A:
**Answer**
the notochord

*Question*
Q: What is the name of the process that changes some chemical substances into others? Choices: - acid reaction - mixture - hypodermic reaction - chemical reaction A:
**Answer**
chemical reaction