[Solved] __________ reactions are used to replace TCA cycle intermediates that have been used to provide carbon skeletons for amino acid biosynthesis. A)Amphibolic B)Anaplerotic C)Anabolic D)Catabolic Industry: A group of companies that produce similar goods or services, engaged in the same type of business. Variable Costs: Variable costs are expenses that vary directly with the level of production or output, such as materials and labor used in the manufacturing process. Fixed Costs: Expenses that do not change with the level of output or sales, such as rent, salaries, and insurance premiums. Long Run: The Long Run is a period in economics during which all factors of production and costs are variable, allowing for adjustment to changing market conditions.