Podcast
Questions and Answers
Which structure in humans occasionally results from the failure of the cervical sinus to close?
Which structure in humans occasionally results from the failure of the cervical sinus to close?
- Notochord
- Cervical fistulas (correct)
- Vertebral column
- Gill slits
What is the main respiratory mechanism in vertebrates?
What is the main respiratory mechanism in vertebrates?
- Buccopharyngeal lining
- Skin
- Lungs (correct)
- Extraembryonic membrane
What are the oldest vertebrates that lived in fresh water and had no jaws?
What are the oldest vertebrates that lived in fresh water and had no jaws?
- Mammals
- Reptiles
- Ostracoderms (correct)
- Amphibians
What anatomical feature distinguishes arachnids from protochordates?
What anatomical feature distinguishes arachnids from protochordates?
Which feature is a point of organization exhibited by annelids and arachnids that excludes them from being considered protochordate origins?
Which feature is a point of organization exhibited by annelids and arachnids that excludes them from being considered protochordate origins?
What evidence suggests a relationship between echinoderms and chordates?
What evidence suggests a relationship between echinoderms and chordates?
Which subphylum includes the Ammocoete larva, which was once believed to be an adult protochordate?
Which subphylum includes the Ammocoete larva, which was once believed to be an adult protochordate?
Which characteristic of vertebrates strengthens the hypothesis that they share a common ancestry with protochordates?
Which characteristic of vertebrates strengthens the hypothesis that they share a common ancestry with protochordates?
Under which classification are vertebrates grouped based on their embryonic membrane?
Under which classification are vertebrates grouped based on their embryonic membrane?
Which group of vertebrates is characterized by the presence of limbs?
Which group of vertebrates is characterized by the presence of limbs?
