Which of the following characteristics does coontail exhibit?

Coontail, scientifically known as Ceratophyllum demersum, is an aquatic plant that is distinct for its unique leaf structure. Leaflets of coontail have a finely divided appearance, which gives them a feathery look. They are arranged in a whorled pattern, typically packed tightly together around the stem. This characteristic is essential for distinguishing coontail from other aquatic plants. The toothed edges of the leaflets play a crucial role in the plant's overall adaptability and ecological role in aquatic environments, as they help the plant manage water flow and light absorption effectively.

While other characteristics mentioned in the options may describe different aquatic plants, option B accurately captures the specific morphology of coontail, making it the right answer. Understanding these features is important for effective identification and management of aquatic plants in pest control programs.