Q: The esophagus runs a mainly straight route through the mediastinum of what? Choices: - liver - lungs - stomach - thorax A:
thorax

Q: What kind of cell is a cell with two chromosomes? Choices: - haploid cells - mutated cell - neurotic cell - diploid cell A:
diploid cell

Q: Meningitis is an infection of the membranes that cover the brain and what else? Choices: - umbilical cord - notochord - liver - spinal cord A:
spinal cord

Q: What type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards? Choices: - collective - urban - social - municipal A:
municipal