Q: What is the term for rain that has a ph less than 5, due to carbon dioxide dissolving? A:

OPTIONS:
- frozen rain
- basic rain
- carbon rain
- acid rain

Answer: acid rain

Q: What system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus? A:

OPTIONS:
- male reproductive system
- female uterus system
- female hormone system
- female reproductive system

Answer: female reproductive system

Q: When the ventricles begin to contract, pressure within the ventricles rises and blood flows toward the area of lowest pressure, which is initially in the atria. this backflow causes the cusps of the tricuspid and mitral (bicuspid) valves to close. these valves are tied down to the papillary muscles by these? A:

OPTIONS:
- chollphyide tendineae
- choanocyte tendineae
- photoreactive tendineae
- chordae tendineae

Answer: chordae tendineae

Q: Where does the small intestine begin? A:

OPTIONS:
- mouth
- colon
- spleen
- stomach

Answer:
stomach