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
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Which of the following is a correct characteristic of reptiles?
Reptiles are uricotelic, meaning they excrete uric acid to conserve water.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Hemichordata and Chordata - Protochordata
Which of the following is a distinguishing characteristic of reptiles?
Reptiles have dry, cornified skin covered with epidermal scales or scutes, adapted for terrestrial life.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Ctenophora and Platyhelminthes
Which of the following is a characteristic of archaebacteria?
Archaebacteria occur in harsh habitats such as extremely salty areas, hot springs and marshy areas. Their different cell wall structure supports survival under these conditions.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Kingdom Monera - Archaebacteria and Eubacteria