[Solved] When taxable income on a progressive basis exceeds certain thresholds A)a higher rate of tax is charged on all income. B)tax credits become more important. C)deductions reach a maximum allowable amount. D)the tax rate is increased on the next dollars of income until a new income level is reached. Gymnosperms: A group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes, distinguished by their naked seeds not enclosed in an ovary. Rhizoids: Hair-like structures on the surface of plants, fungi, and algae that absorb water and nutrients and anchor the organism to the substrate. Mosses: Small, non-vascular plants that typically form dense green clumps or mats, often in moist or shady locations. Gametophyte: The sexual phase in the life cycle of plants and algae that produces gametes through mitosis.