What is meant when a cnidarian colony is described as polymorphic? What does it mean when an organism is described as colonial?
When a cnidarian colony is described as polymorphic, it means that the colony consists of different specialized individuals known as zooids that have distinct forms and functions. In other words, there is a variety of body types within the colony.
Cnidarians are a group of aquatic animals that include jellyfish, sea anemones, and corals, among others. Within a cnidarian colony, each zooid performs a specific task, such as feeding, reproduction, or defense. Throughout the colony, you may find individuals with different structures, shapes, or sizes that are adapted to fulfill these various roles. This polymorphism allows the colony to be more efficient in carrying out its collective functions.
On the other hand, when an organism is described as colonial, it means that it is made up of multiple genetically identical individuals called polyps. These polyps are capable of living independently but are physically connected to form a larger colonial organism. Each polyp within the colonial organism has its own feeding and reproductive structures, but they share a common body wall. Some examples of colonial organisms are certain species of corals, sponges, and bryozoans.
In summary, a polymorphic cnidarian colony consists of specialized individuals with different forms and functions, while a colonial organism is made up of multiple genetically identical individuals that are physically connected.