[Solved] The reaction catalyzed by pyruvate carboxylase is an example of a(n)______ reaction because it replenishes the citric acid cycle intermediates that have been siphoned off for use in other reactions. A)amphibolic B)amphipathic C)anaplerotic D)cataplerotic E)none of the above Steep Pillars: Tall, vertical rock formations resulting from the erosion of surrounding softer material, often seen in high-gradient areas. Tropical: Relating to or characteristic of the tropics, typically hot and humid climate zones between the Tropic of Cancer and the Tropic of Capricorn. Cave: A natural underground chamber, generally large enough for a person to enter. Dissolution: The process of a solid substance becoming incorporated into a liquid to form a solution.