Which of the following animal groups is characterized by having a notochord at some stage of their life cycle?

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Q: Which of the following animal groups is characterized by having a notochord at some stage of their life cycle?

Solution: Chordates are characterized by having a notochord at some stage in their life cycle, which is a defining feature of this group.

Steps: 4

Step 1: Understand what a notochord is. A notochord is a flexible rod-like structure that provides support in the body of some animals.
Step 2: Learn about chordates. Chordates are a group of animals that have a notochord at some point in their life cycle.
Step 3: Identify the life stages of chordates. Chordates may have a notochord during their embryonic stage or throughout their life.
Step 4: Recognize that all animals in the chordate group share this characteristic, which helps define them.