Dorsal Structure, Ventral Structure, Anterior, and Posterior.
No, the tails of a whale and a fish are not homologous structures. They have different evolutionary origins and structures, with the whale having a fluke-shaped tail and the fish having a more traditional fin-like tail.
Fins are fan-like on some fish, they are used to move the fish in the water.
To obtain resources for fish, common structures include fishing boats equipped with nets or lines for catching fish, fish farms where fish are raised in controlled environments, and fish processing plants where fish are cleaned, processed, and packaged for distribution. Additionally, fishing ports and fish markets are important structures where fishermen can sell their catch to consumers.
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The gills
Gill arches: These structures support the gills used for respiration in fish. Swim bladder: This structure helps fish control their buoyancy in water. Scales: Most fish have scales that provide protection and reduce friction as they swim.
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Wings
gills
how are parts of birds & fish similar in structure & function
Gilbert D. Fish has written: 'Arc-welded steel frame structures'
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