Which of the following is a characteristic of all chordates?Group of answer choicesThey all have vertebral columns.They all exhibit radial symmetry.They all have a notochord sometime during the life cycle.They all have an exoskeleton sometime during the life cycle.They all have a pseudocoelom.
Question
Which of the following is a characteristic of all chordates?Group of answer choicesThey all have vertebral columns.They all exhibit radial symmetry.They all have a notochord sometime during the life cycle.They all have an exoskeleton sometime during the life cycle.They all have a pseudocoelom.
Solution 1
The characteristic of all chordates is that they all have a notochord sometime during the life cycle.
Here's why:
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Not all chordates have vertebral columns. For example, tunicates and lancelets are chordates but they do not have vertebral columns.
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Chordates do not all exhibit radial symmetry. This is a characteristic more commonly associated with animals like starfish or jellyfish.
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All chordates do have a notochord at some point in their life cycle. This is a flexible rod that supports the body. It may be replaced by a vertebral column in some animals, like mammals, but it is present at some stage in all chordates.
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Not all chordates have an exoskeleton at some point in their life cycle. This is a characteristic more commonly associated with animals like insects or crustaceans.
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Chordates do not have a pseudocoelom. A pseudocoelom is a body cavity that is not completely lined by mesoderm, and this is not a feature found in chordates.
Solution 2
The characteristic of all chordates is that they all have a notochord sometime during the life cycle.
Here's why:
-
Not all chordates have vertebral columns. For example, tunicates and lancelets are chordates but they do not have vertebral columns.
-
Chordates do not all exhibit radial symmetry. This is a characteristic more commonly associated with animals like starfish or jellyfish.
-
All chordates do have a notochord at some point in their life cycle. This is a flexible rod that supports the body. It may be replaced by a vertebral column in some animals, like mammals, but it is present at some stage in all chordates.
-
Not all chordates have an exoskeleton at some point in their life cycle. This is a characteristic more commonly associated with animals like insects or crustaceans.
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Chordates do not have a pseudocoelom. A pseudocoelom is a body cavity that is not completely lined by mesoderm, and this is not a feature of chordates.
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