Which of the following is incorrect regarding mammals?
Not all mammals are viviparous. Monotremes (e.g., platypus) lay eggs.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Vertebrata - Aves and Mammalia
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Which feature is found in both reptiles and birds, showing their evolutionary relationship?
Both reptiles and birds possess scales, which indicates their evolutionary connection.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which of the following characteristics is incorrect about mammals?
Mammals are warm-blooded (homeothermic), not cold-blooded.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which of the following statements about birds (Aves) is correct?
Birds have pneumatic (hollow) bones, which make them lightweight and aid in flight.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which of the following is a characteristic feature of mammals?
Mammals are distinguished by the presence of mammary glands, which produce milk for their young.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which of the following statements about mammals is correct?
Mammary glands are a defining feature of mammals, used to produce milk for their young.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which of the following characteristics is common to both reptiles and birds?
Both reptiles and birds possess scales, which indicate their evolutionary relationship.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which class of vertebrates is exclusively viviparous?
Mammals are distinguished by their viviparous nature, meaning they give birth to live young.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which of the following statements about mammals is incorrect?
Mammals have a four-chambered heart, not a three-chambered one.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which of the following is a characteristic feature of class Reptilia?
Reptiles have dry, cornified skin covered with epidermal scales or scutes.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which class of vertebrates has a two-chambered heart?
Fishes (class Pisces) have a two-chambered heart, consisting of one atrium and one ventricle.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which of the following is an example of an oviparous mammal?
Ornithorhynchus (platypus) is an oviparous mammal, meaning it lays eggs instead of giving birth to live young.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia