Question

Which of the followingis radially symmetrical deuterostome invertebrate most closely related to chordates? . a. annelid. b. echinoderm. c. arthropod. d. mollusk

Answer 1

The correct answer is option B

Deuterosome is a subphylum of animals which means second mouth. It is also a sister clade of the Protostomia.

In deuterostomes the first opening becomes the anus but in case of protostomes the first opening becomes mouth.

The clade of deuterosomes is Echinoderm that is related to chordates.

Answer 2

the one that is radially symmetrical deuterostome invertebrate that most closely related to chordates is : B. echinoderm

This organisms doesn't have a backbone and known for being radially symmetrical. An example of a echinoderm is a Starfish

hope this helps