Multiple Choice
Which of the following organisms is most likely to be a diploblast?
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30. Overview of Animals
Overview of Animals
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Which of the following are key defining features of jawed fishes?
A
Presence of jaws and paired fins
B
Ability to breathe through skin
C
Lack of vertebral column
D
Exclusively cartilaginous skeleton
Verified step by step guidance1
Understand the basic anatomy of jawed fishes, which are part of the superclass Gnathostomata. These fishes are characterized by having jaws, which are crucial for their feeding mechanisms.
Recognize that paired fins are another defining feature of jawed fishes. These fins provide stability and maneuverability in the water, aiding in their locomotion.
Consider the ability to breathe through skin. This is not a characteristic of jawed fishes; instead, they primarily use gills for respiration.
Evaluate the presence of a vertebral column. Jawed fishes do have a vertebral column, which is part of their internal skeleton structure.
Understand the composition of the skeleton. While some jawed fishes, like sharks, have a cartilaginous skeleton, not all jawed fishes have exclusively cartilaginous skeletons. Many have bony skeletons.
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