Q1. Which structure in mollusks is responsible for locomotion?A. RadulaB. MantleC. Muscular footD. Parapodia
Q2. Which of the following is an example of a jawless fish?A. ScoliodonB. HippocampusC. PetromyzonD. Labeo
Q3. Which of the following characteristics is common to both reptiles and birds?A. Presence of a four-chambered heart in all membersB. Laying amniotic eggsC. Possession of sweat glandsD. Having an external ear
Q4. Which of the following structures in birds reduces their body weight and facilitates flight?A. Hollow bonesB. Cartilaginous skeletonC. Lung with air sacsD. Thick, heavy beak
Q5. Which of the following statements about echinoderms is incorrect?A. They exhibit bilateral symmetry in the adult stageB. They have a water vascular systemC. They possess an endoskeleton made of calcareous ossiclesD. They are exclusively marine
Q6. Which of the following statements about mollusks is correct?A. They have a segmented bodyB. They have an open circulatory system except for cephalopodsC. They have a pseudocoelomD. They use Malpighian tubules for excretion
Q7. Which of the following statements about birds is incorrect?A. They have pneumatic (hollow) bonesB. They excrete urea as their primary nitrogenous wasteC. They have a four-chambered heartD. They are oviparous
Q8. What is the major functional difference between open and closed circulatory systems?A. In a closed circulatory system, blood is pumped into sinuses instead of vesselsB. An open circulatory system allows direct diffusion of nutrients and gases to tissuesC. A closed circulatory system is only found in invertebratesD. Only vertebrates have an open circulatory system
Q9. Which feature is unique to phylum Hemichordata?A. Presence of a notochordB. Body divided into proboscis, collar, and trunkC. Exoskeleton made of chitinD. Water vascular system
Q10. Which of the following statements about mammals is correct?A. All mammals give birth to live youngB. They have a four-chambered heartC. They lack sweat glandsD. They excrete uric acid