Asked by ethan rivera on May 19, 2024
Verified
Placoid scales are found on:
A) fleshy-finned fishes.
B) cartilaginous fishes.
C) ray-finned fishes.
D) lampreys.
E) hagfishes.
Placoid Scales
The toothlike scales found in sharks and other cartilaginous fishes.
Cartilaginous Fishes
A class of fishes that have skeletons made entirely out of cartilage, rather than bone.
- Comprehend the evolutionary significance of scale types among fishes.
Verified Answer
SK
Sumeet KumarMay 21, 2024
Final Answer :
B
Explanation :
Placoid scales, also known as dermal denticles, are characteristic of cartilaginous fishes, such as sharks and rays. These scales give their skin a rough texture and are different from the scales found on bony fishes.
Learning Objectives
- Comprehend the evolutionary significance of scale types among fishes.
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