[Solved] Stomata are A) unique to monocots. B) unique to eudicots. C) unique to vascular plants. D) unique to desert plants. E) ancient structures found among nearly all plant species. Benchmark Pricing: A method of pricing where a standard or reference price is used to set or compare the price of goods and services. Similar Products: Goods that serve comparable purposes or needs and can be considered substitutes for each other by consumers. Short Run: A period in economics during which at least one factor of production is fixed, limiting the ability of the economy or firm to adjust. Long Run: A time frame in economics where all factors of production can be varied, allowing for full adjustment to changes.