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
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Which feature distinguishes marsupials from other mammals?
Marsupials, like kangaroos, have a pouch where their young complete development after birth (NCERT, Chapter 4, page 59). Egg-laying is in monotremes, mammals have four-chambered hearts, and all mammals have hair.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Which of the following animals belongs to class Amphibia?
Rana (frog) belongs to class Amphibia, characterized by its ability to live both on land and in water.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Amphibia and Reptilia
Which of the following features is incorrect regarding birds?
Birds are homeothermic (warm-blooded), not poikilothermic (cold-blooded).
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Cyclostomata and Pisces
Which of the following statements about reptiles is incorrect?
Reptiles do not have a diaphragm; their breathing is dependent on rib movements.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Cyclostomata and Pisces
Which of the following characteristics is found in all chordates?
All chordates possess a dorsal hollow nerve cord at some stage in their life cycle.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Cyclostomata and Pisces
Which of the following statements about vertebrates is correct?
Vertebrates include both jawless (Cyclostomata) and jawed (Gnathostomata) animals.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Hemichordata and Chordata - Protochordata
Which of the following statements about birds is incorrect?
Birds do not have a diaphragm; instead, they use air sacs to assist in respiration.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Hemichordata and Chordata - Protochordata
Which of the following statements about arthropods is correct?
Arthropods are characterized by the presence of jointed appendages, which aid in movement and other functions.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Hemichordata and Chordata - Protochordata
Which of the following statements about fishes is incorrect?
Most fishes breathe through gills, not lungs, though some, like lungfish, have specialized respiratory adaptations.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Hemichordata and Chordata - Protochordata
Which of the following animals belongs to the phylum Hemichordata?
Balanoglossus is a hemichordate, characterized by a proboscis, collar, and trunk.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Hemichordata and Chordata - Protochordata
Which of the following animals belongs to phylum Mollusca?
Pinctada (pearl oyster) belongs to phylum Mollusca, which is characterized by a soft body and a calcareous shell.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Aschelminthes and Annelida