객관식
How many dorsal fins do lobe-finned fish typically have?
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30. Overview of Animals
Overview of Animals
객관식
What are the major groups of bony fish?
A
Cartilaginous fish and jawless fish
B
Mammals and birds
C
Ray-finned fish and lobe-finned fish
D
Amphibians and reptiles
검증된 단계별 안내1
Begin by understanding the classification of fish. Fish are broadly categorized into three major groups: jawless fish, cartilaginous fish, and bony fish.
Focus on bony fish, which are characterized by having a skeleton made primarily of bone rather than cartilage.
Bony fish are further divided into two major groups: ray-finned fish and lobe-finned fish.
Ray-finned fish, or Actinopterygii, have fins supported by bony spines known as rays. This group includes the majority of fish species.
Lobe-finned fish, or Sarcopterygii, have fleshy, lobed, paired fins, which are joined to the body by a single bone. This group includes species like coelacanths and lungfish.
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