Q1. Which of the following characteristics is found in birds but not in mammals?A. Four-chambered heartB. EndothermyC. Presence of feathersD. Internal fertilization
Q2. Which of the following is a correct feature of reptiles?A. They are homeothermic (warm-blooded)B. They have an incomplete four-chambered heart except for crocodilesC. They have moist, glandular skinD. They excrete ammonia as their primary nitrogenous waste
Q3. Which type of coelom is present in arthropods?A. AcoelomateB. PseudocoelomateC. CoelomateD. Hemocoelomate
Q4. Which of the following statements about mammals is correct?A. All mammals lay eggsB. They have a four-chambered heartC. They lack sweat glandsD. They excrete uric acid
Q5. Which of the following is a characteristic feature of mammals?A. Presence of feathersB. Ectothermic natureC. Hair or fur on the bodyD. Scales covering the entire body
Q6. Which of the following statements about fishes is incorrect?A. Cartilaginous fishes have a cartilaginous endoskeletonB. Bony fishes possess a swim bladderC. All fishes breathe through lungsD. Cartilaginous fishes lack an operculum
Q7. Which feature is common in all chordates at some stage of their life cycle?A. ExoskeletonB. Dorsal hollow nerve cordC. Open circulatory systemD. Triploblastic body
Q8. Which of the following statements about Osteichthyes is incorrect?A. They have a bony endoskeletonB. They possess a two-chambered heartC. They lack an operculumD. They use a swim bladder for buoyancy
Q9. Which of the following characteristics is common to both birds and mammals?A. Possession of mammary glandsB. Endothermy (warm-blooded nature)C. Presence of fur or hairD. Ability to give birth to live young