What does “when in doubt, throw it out” mean

All of the following are potential risks of leaving a small child unattended in a car, except: a. hypothermia b. carbon monoxide poisoning c. car theft with child inside d. lead poisoning

Group of genes that encode molecules found in all body cells, creating a biochemical “fingerprint” that serves as the “id” for cells so that they are marked as “self” a) deoxyribonucleic acid (dna) b) entry inhibitors c) major histocompatibility complex (mhc) d) non-nucleoside reverse transcription inhibitors (nnrtis)

Which one is not a part of the base of the cranial cavity? a.scala anterior b.scala media c.scala lateralis d.scala posterior