Mcqs on Chordates

By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

What is the defining characteristic of chordates? A) Exoskeleton B) Segmented body C) Notochord D) Jointed appendages Answer: C) Notochord Which subphylum includes vertebrates with jaws? A) Urochordata B) Cephalochordata C) Myxini D) Vertebrata Answer: D) Vertebrata In chordates, the nerve cord is located: A) Ventral to the notochord B) Dorsal to the notochord C) Alongside the notochord D) Absent in chordates Answer: B) Dorsal to the notochord Which class includes mammals, reptiles, birds, and amphibians? A) Mammalia B) Reptilia C) Aves D) Amphibia Answer: A) Mammalia The pharyngeal slits in chordates are involved in: A) Hearing B) Respiration C) Filter feeding D) Thermoregulation Answer: C) Filter feeding Which chordate subphylum includes animals known as lancelets? A) Urochordata B) Cephalochordata C) Myxini D) Vertebrata Answer: B) Cephalochordata What is the primary function of the notochord in chordates? A) Filter feeding B) Structural support C) Gas exchange D) Locomotion Answer: B) Structural support Which group of chordates is characterized by a cartilaginous skeleton and includes sharks and rays? A) Urochordata B) Cephalochordata C) Myxini D) Chondrichthyes Answer: D) Chondrichthyes The amniotic egg is a characteristic feature of which class of chordates? A) Mammalia B) Reptilia C) Aves D) Amphibia Answer: B) Reptilia In chordates, the post-anal tail is: A) Absent B) Found only in larvae C) Reduced in adults D) Present in both larvae and adults Answer: D) Present in both larvae and adults