Prepare for NEET Biology Animal Kingdom (Cyclostomata) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert help to study jawless fishes like lampreys and hagfishes.
The velum in cyclostomes acts as a valve separating the:
Respiratory tube from the digestive tube
Nasal cavity from the oral cavity
Heart from the liver
Brain from the spinal cord
Which unique characteristic of cyclostome kidneys distinguishes them from gnathostomes?
Presence of a mesonephros
Retention of a functional pronephros in adults
Absence of a metanephros
Secretion of ammonia as the primary nitrogenous waste
The 'tongue-like' structure in cyclostomes used for rasping is supported by:
A bony hyoid arch
A complex lingual cartilage
Modified pharyngeal teeth
Muscular hydrostats
Unlike most vertebrates, cyclostomes lack:
A notochord
Jaws and paired appendages
A vertebral column
A closed circulatory system
The unique tiedemann's bodies found in lampreys are associated with which organ system?
Digestive system
Respiratory system
Lymphatic system
Excretory system
Which feature of the cyclostome circulatory system reflects their primitive vertebrate status?
Closed circulatory system
Presence of accessory hearts in addition to the main heart
Presence of hemoglobin in blood
Distinct separation of oxygenated and deoxygenated blood
Which of the following is a characteristic feature of Cyclostomata?
Presence of jaws
Absence of jaws
Paired fins
Bony skeleton
Lampreys are known for their:
Herbivorous diet
Parasitic feeding habit
Filter feeding
Detritivorous diet
