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Phylum Chordata: Anatomy, Physiology, and Evolution

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Phylum Chordata: Anatomy, Physiology, and Evolution

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Questions and Answers

Which of the following is a characteristic of vertebrates?

Absence of a vertebral column

Presence of a notochord

Post-anal tail during development (correct)

Lack of pharyngeal slits

What is the defining feature of invertebrate chordates?

Dorsal hollow nerve cord

Vertebral column

Notochord (correct)

Absence of pharyngeal slits

Which class of chordates includes organisms with the characteristic of housing and protecting the spinal cord?

Birds (Aves)

Reptiles (Reptilia)

Fish (Fish) (correct)

Amphibians (Amphibia)

During which period did the phylum Chordata originate?

Cambrian period (D) Signup and view all the answers

What is the function of the notochord in chordates?

To provide initial skeletal support and maintain body shape (D) Signup and view all the answers

What is the composition of the dorsal hollow nerve cord in chordates?

Outer covering called ectoderm and inner covering called endoderm (B) Signup and view all the answers

What do the pharyngeal slits in chordates eventually give rise to?

Gill slits in vertebrates and other derivatives in invertebrate chordates (B) Signup and view all the answers

What is a common feature of respiratory systems in chordates?

Adaptation to specific environments (D) Signup and view all the answers

What is a key component of the nervous system in chordates?

A brain, spinal cord, and peripheral nerves (D) Signup and view all the answers

What determines whether chordates have an endoskeleton or exoskeleton?

Their class (C) Signup and view all the answers