Q: What is the term for a watertight seal between two adjacent animal cells? Choices: - cell membrane - cell wall - placental barrier - tight junction A:
tight junction

Q: Rust is an example of the reaction of oxygen with what? Choices: - fuel - carbon - coal - iron A:
iron

Q: What do the ears have to be protected from in order to avoid hearing loss? Choices: - Cold weather - Water - Storms - loud sounds A:
loud sounds