Q1. Which of the following is a distinguishing feature of class Cyclostomata?A. Jaws presentB. Paired fins presentC. Cartilaginous endoskeletonD. Circular, jawless mouth
Q2. Which of the following is a key adaptation seen in parasitic helminths?A. Well-developed digestive systemB. Highly developed nervous systemC. High reproductive capacityD. Presence of jointed appendages
Q3. Which of the following is a characteristic feature of phylum Porifera?A. Presence of a gastrovascular cavityB. Water canal systemC. Bilateral symmetryD. Exoskeleton made of chitin
Q4. Which of the following adaptations helps reptiles conserve water in dry environments?A. Thin, moist skinB. Cornified, keratinized skinC. Gills for respirationD. Secretion of ammonia as nitrogenous waste
Q5. Which of the following is the most common mode of reproduction in echinoderms?A. Asexual reproduction through fragmentationB. Sexual reproduction with external fertilizationC. HermaphroditismD. Viviparity
Q6. Which of the following features is incorrect about mammals?A. They have a diaphragm for respirationB. They are cold-bloodedC. They possess mammary glandsD. They have heterodont dentition
Q7. Which of the following statements about birds is incorrect?A. They have pneumatic bonesB. They excrete uric acid as their primary nitrogenous wasteC. They have a diaphragm for respirationD. They are oviparous
Q8. Which of the following features is incorrect about birds?A. They have pneumatic (hollow) bonesB. They excrete ureaC. They are oviparousD. They have a four-chambered heart
Q9. Which of the following features is incorrect about birds?A. They are oviparousB. They excrete uric acidC. They have an incomplete double circulationD. They have hollow bones
Q10. Which characteristic feature differentiates Urochordata from Cephalochordata?A. Presence of a vertebral columnB. Notochord is present only in the larval stage of UrochordataC. Adults of Cephalochordata exhibit asymmetryD. Both groups lack pharyngeal gill slits