[Solved] Based on the Dominion Bond Rating Service a bond with a rating of AA has what type of credit? A)Highest B)Superior C)Good D)Adequate E)Speculative Ginkgo: A member of an ancient gymnosperm group that consists of a single living representative (Ginkgo biloba), a hardy, deciduous tree with broad, fan-shaped leaves and naked, fleshy seeds (on female trees) Nonmotile Sperm: Sperm cells that lack the ability to move or swim, which can affect fertilization capabilities. Pollen Grains: Microscopic structures that carry the male gametes of seed plants and are necessary for fertilization. Phloem: Phloem is the living tissue in plants that transports the soluble organic compounds made during photosynthesis (notably sugars) to various parts of the plant.