Coelenterate
A)an invertebrate animal with jointed legs and an exoskeleton
B)an animal having no backbone
C)an outer covering that supports the soft inner tissues in an arthropod
D)an ocean invertebrate having spiny skin
E)an invertebrate animal that has tentacles around its mouth
B)an animal having no backbone
sessile
A)a section or part of an animal's body
B)not moving from place to place; attached in a permanent location
C)a layer of skin-like material that in many animals can produce a shell
D)a long appendage around the head of an animal used for holding or moving
E)mouth parts that work as jaws
B)not moving from place to place; attached in a permanent location
The correct answer is E) an invertebrate animal that has tentacles around its mouth.
To arrive at this answer, you can break down the word "Coelenterate" and its characteristics.
First, consider that "Coelenterate" refers to a specific group of animals, which implies that the answer must identify a type of animal rather than a characteristic.
Next, you can examine the root of the word "Coelenterate." The term "Coel-" comes from the Greek word "koilos," meaning "hollow." This indicates that Coelenterates likely have some sort of hollow structure.
Lastly, look for the identifying characteristics mentioned in the options. Jointed legs and an exoskeleton (option A) are characteristics found in arthropods like insects and crustaceans, not Coelenterates. An animal having no backbone (option B) refers to invertebrates, which includes Coelenterates. However, there are several types of invertebrates, so this option is not specific enough. An outer covering that supports the soft inner tissues in an arthropod (option C) is a description of the exoskeleton, which is not a defining characteristic of Coelenterates. An ocean invertebrate having spiny skin (option D) could include different kinds of animals, not necessarily Coelenterates.
Finally, the option that accurately describes a key characteristic of Coelenterates is E) an invertebrate animal that has tentacles around its mouth. Coelenterates, also known as Cnidarians, possess primitive stinging cells called cnidocytes. These animals typically have tentacles surrounding their mouth and use the stinging cells for capturing prey and defense.