85 public questions tagged with this topic.
Mammals are distinguished by their viviparous nature, meaning they give birth to live young. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.
Rana (frog) belongs to class Amphibia, characterized by its ability to live both on land and in water. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Zoology section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Zoology portion (Latest NCERT Textbooks for Academic Session 2026-27 - Rationalized Edition for Class XI and XII), Topic: Structural organization, physiology, human health and related concepts as per latest syllabus.
Spiders and scorpions (Arachnida) possess book lungs for respiration, which are made up of thin, leaf-like structures. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Zoology section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Zoology portion (Latest NCERT Textbooks for Academic Session 2026-27 - Rationalized Edition for Class XI and XII), Topic: Structural organization, physiology, human health and related concepts as per latest syllabus.
Birds are the only vertebrates that possess feathers, which help in flight and insulation. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.
Mammals are distinguished by the presence of mammary glands, which produce milk for their young. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.
Both reptiles and birds possess scales, which indicates their evolutionary connection. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Evolution, Topic: Theories, Hardy-Weinberg principle and evidences.
During the tadpole stage, frogs use gills for respiration before developing lungs in adulthood. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function, Topic: Structural organization and physiology.
Flame cells function as the excretory organs in Platyhelminthes, playing a role in osmoregulation and waste removal.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Regulation of Kidney Function - RAAS ADH ANF
Pneumatic (hollow) bones in birds reduce body weight, enhancing flight efficiency (NCERT, Chapter 4, page 58). Birds have a four-chambered heart, scaly skin is in reptiles, and mammary glands are in mammals.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Pristis (Sawfish) belongs to class Chondrichthyes and has a cartilaginous skeleton.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Cyclostomata and Pisces
Birds have hollow (pneumatic) bones, which reduce their body weight and aid in flight.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Cyclostomata and Pisces
Petromyzon (lamprey) is a jawless fish belonging to class Cyclostomata.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Cyclostomata and Pisces
