Which one of the following groups of animals is correctly...

Name: Problem 72, Chapter 4: Objective NCERT at your FINGERTIPS: Biology
Uploaded: 2021-10-06T02:07:33-08:00
Duration: 3 min 21 s
Channel: Aflah M
Description: Which one of the following groups of animals is correctly matched with its characteristic feature without any exception? (a) Reptilia : possess 3-chambered heart with an incompletely divided ventricle (b) Chordata : possess a mouth with an upper and a lower jaw (c) Chondrichthyes: possess cartilaginous endoskeleton (d) Mammalia: give birth to young ones

Which one of the following groups of animals is correctly matched with its characteristic feature without any exception? (a) Reptilia : possess 3-chambered heart with an incompletely divided ventricle (b) Chordata : possess a mouth with an upper and a lower jaw (c) Chondrichthyes: possess cartilaginous endoskeleton (d) Mammalia: give birth to young ones

Which one of the following groups of animals is correctly matched with its characteristic feature without any exception?
(a) Reptilia : possess 3-chambered heart with an incompletely divided ventricle
(b) Chordata : possess a mouth with an upper and a lower jaw
(c) Chondrichthyes: possess cartilaginous endoskeleton
(d) Mammalia: give birth to young ones

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Key Concepts

Reptile Cardiovascular System

Reptiles typically have a heart with three chambers, but there are notable exceptions such as crocodilians which have a four?chambered heart. This variation is important when evaluating blanket statements about reptilian heart structure in the context of animal physiology.

Chordate Jaw Structures

Within the phylum Chordata, having jaws is a significant feature found in many vertebrates; however, the group includes jawless fish like lampreys and hagfish, indicating that the presence of jaws is not a universal trait for all chordates.

Cartilaginous Endoskeleton in Chondrichthyes

Members of the class Chondrichthyes, such as sharks, rays, and skates, consistently possess an endoskeleton made of cartilage instead of bone. This characteristic is a defining and universally applicable trait for this group.

Mammalian Reproductive Strategies

Mammals are generally characterized by live birth, but there are exceptions among monotremes (like the platypus and echidna) that lay eggs. This diversity in reproductive methods means that live birth cannot be uniformly applied to all mammals.

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