NEET Solved Paper 2016 Question 55
Question: Which of the following characteristic features always holds true for the corresponding group of animals?
Options:
A) Cartilaginous endoskeleton Chondrichthyes
B) Viviparous Mammalia
C) Posses a mouth with an upper and a lower jaw Chordata
D) 3 - chambered heart with one incompletely divided ventricle Reptilia
Show Answer
Answer:
Correct Answer: A
Solution:
Explanation:
- Chondrichthyes (cartilaginous fishes) always have a cartilaginous endoskeleton.
- Not all mammals are viviparous; some, like monotremes (e.g., platypus and echidna), lay eggs.
- Not all chordates possess a mouth with an upper and a lower jaw; for example, some primitive chordates like lancelets and tunicates do not have jaws.
- Not all reptiles have a 3-chambered heart with one incompletely divided ventricle; for example, crocodilians have a 4-chambered heart.
BETA
