The spines of the stickleback are modified forms of which body part?

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Study for the Stickleback Test. Practice with multiple choice questions and detailed explanations. Ace your exam with confidence!

Multiple Choice

The spines of the stickleback are modified forms of which body part?

Explanation:
Spines are modified fins. In sticklebacks, the rigid spines come from the dorsal fin rays, turning the normal fin supports into stiff, protective projections. This is different from gills (breathing organs), teeth (feeding structures), or scales (skin coverings), which are not the source of these spines.

Spines are modified fins. In sticklebacks, the rigid spines come from the dorsal fin rays, turning the normal fin supports into stiff, protective projections. This is different from gills (breathing organs), teeth (feeding structures), or scales (skin coverings), which are not the source of these spines.

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