Asked by Arpit Bapna on Jul 22, 2024
Verified
Describe the shared derived characteristics that support grouping the hemichordates, chordates, and echinoderms together as deuterostomes.
Hemichordates
A group of marine animals closely related to chordates, characterized by having a body divided into three parts: a proboscis, a collar, and a trunk.
Deuterostomes
A group of animals characterized by the development of the mouth from an opening other than the blastopore during embryonic development.
Derived Characteristics
Traits that are present in an organism but were absent in the last common ancestor of the group to which the organism belongs.
- Acquire knowledge of the distinctive characteristics among leading vertebrate classes.
- Recapitulate the evolutionary affiliations of tetrapods, underscoring their unique characteristics.
Verified Answer
JB
Jeremy BauerJul 24, 2024
Final Answer :
Shared derived characteristics that support grouping the hemichordates, chordates, and echinoderms together as deuterostomes are similarities in patterns of development as illustrated by radial, indeterminate cleavage and blastopore development into an anus, not mouth.
Shared derived anatomical characteristics include endoskeletons and true coeloms.
Shared derived anatomical characteristics include endoskeletons and true coeloms.
Learning Objectives
- Acquire knowledge of the distinctive characteristics among leading vertebrate classes.
- Recapitulate the evolutionary affiliations of tetrapods, underscoring their unique characteristics.