(Q).
Q: What are alloys that are mostly composed of mercury known as? Read this paragraph and choose the correct option from the provided answers: Alloys that are mostly composed of mercury are known as amalgams . Amalgams often have special properties that stem from the fact that mercury exists as a liquid at room temperature. As a result, metal amalgams are used for a variety of purposes, including dentistry and the extraction of other pure metals such as gold. Choices: - halogens - fillings - compounds - amalgams A:
(A).
amalgams

(Q).
Q: Heart valves prevent what kind of blood flow from happening in the heart? Read this paragraph and choose the correct option from the provided answers: Choices: - irregular flow - quick flow - slow flow - backflow A:
(A).
backflow

(Q).
Q: What type of behaviors are triggered by pheromones in moths? Read this paragraph and choose the correct option from the provided answers: Choices: - exhibit - illuminating - peculiar - courtship A:
(A).
courtship