Which of the following represents the correct combination of a taxonomic group with its characteristics?
Group Characteristics
1 Osteicthyes They have to swim constantly to avoid sinking
2 Amphibia Skin is dry without glands except oil gland
3 Aves Air sacs connected to lungs supplement respiration
4 Reptilia Body is covered by dry and cornified skin with dermal scales

Easy

Solution

In birds (Aves), air sacs connected to lung supplement ventilation.
Skin is moist in amphibians. Oil gland in present in birds; not amphibians.
Members of Chondrichthyes (not Osteichthyes) have to swim constantly to avoid sinking because they lack air bladder.
Scales of reptiles are epidermal (scales of fishes are dermal).

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	Group	Characteristics
1	Osteicthyes	They have to swim constantly to avoid sinking
2	Amphibia	Skin is dry without glands except oil gland
3	Aves	Air sacs connected to lungs supplement respiration
4	Reptilia	Body is covered by dry and cornified skin with dermal scales