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Questions and Answers
What is the defining characteristic of the Class Aves within the subphylum Vertebrata?
What is the defining characteristic of the Class Aves within the subphylum Vertebrata?
- Development of a bony vertebral column in the adult
- Possession of a ventral muscular heart with two, three, or four chambers (correct)
- Lack of paired appendages
- Presence of a notochord throughout their life
Why are Urochordata and Cephalochordata often referred to as protochordates?
Why are Urochordata and Cephalochordata often referred to as protochordates?
- They are exclusively marine organisms
- They exhibit some primitive chordate characteristics (correct)
- They possess a bony vertebral column
- They lack a notochord during the embryonic period
How does the notochord differ between Urochordata and Cephalochordata?
How does the notochord differ between Urochordata and Cephalochordata?
- Cephalochordata has a bony notochord, unlike Urochordata
- Urochordata has a notochord in the head region, whereas Cephalochordata has it in the tail
- The notochord is absent in both Urochordata and Cephalochordata
- Urochordata has a persistent notochord throughout life, while Cephalochordata has it only in the larval tail (correct)
Which subphylum includes organisms that have a notochord during the embryonic period?
Which subphylum includes organisms that have a notochord during the embryonic period?
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What replaces the notochord in adult vertebrates?
What replaces the notochord in adult vertebrates?
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Which class among vertebrates bears limbs?
Which class among vertebrates bears limbs?
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