TG EAMCET (EAPCET) Zoology Multiple Choice Questions (MCQs)

31. Which of the following is a characteristic feature of phylum Chordata?

• a) Absence of notochord
• b) Presence of dorsal hollow nerve cord
• c) Ventral solid nerve cord
• d) Absence of pharyngeal gill slits

Answer: b) Presence of dorsal hollow nerve cord

32. The subphylum Urochordata is also known as:

• a) Sea worms
• b) Tunicates
• c) Lancelets
• d) Lampreys

Answer: b) Tunicates

33. Which class of vertebrates includes organisms with cartilaginous skeletons and placoid scales?

• a) Amphibia
• b) Osteichthyes
• c) Chondrichthyes
• d) Reptilia

Answer: c) Chondrichthyes

34. The superclass Agnatha is characterized by the absence of:

• a) Paired fins
• b) Jaws
• c) Vertebral column
• d) Nerve cord

Answer: b) Jaws

35. Which of the following organisms belongs to the class Cyclostomata?

• a) Shark
• b) Frog
• c) Lamprey
• d) Tuna

Answer: c) Lamprey

36. The organisms in class Amphibia typically have:

• a) Dry and scaly skin
• b) Gills throughout life
• c) Dual life in water and on land
• d) Feathers for insulation

Answer: c) Dual life in water and on land

37. Birds belong to the class Aves and are characterized by:

• a) Mammary glands
• b) Dry and scaly skin
• c) Pneumatic bones
• d) Viviparity

Answer: c) Pneumatic bones

38. Which of the following is an example of a bony fish belonging to the class Osteichthyes?

• a) Rohu
• b) Stingray
• c) Dogfish
• d) Salamander

Answer: a) Rohu

39. Mammals are unique among chordates because they possess:

• a) Feathers and pneumatic bones
• b) Mammary glands and hair
• c) Cartilaginous skeleton
• d) Gills and scales

Answer: b) Mammary glands and hair

40. In reptiles, which of the following adaptations aids in preventing water loss?

• a) Slimy skin
• b) Dry and keratinized skin
• c) Feathers
• d) Gills

Answer: b) Dry and keratinized skin