Match the Organism with the Correct Caudal Fin Shape

question 72

Multiple Choice

Match the organism with the correct caudal fin shape. Use each choice once, more than once, or not at all.
-yellowtail snapper

• A)truncate caudal fin
• B)rounded caudal fin
• C)lunate caudal fin
• D)forked caudal fin
• E)heterocercal caudal fin

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Definitions:

Myosin Filaments

Thick filaments within muscle cells that interact with actin filaments to cause muscle contraction through a sliding filament mechanism.

Muscle Contraction

The process where muscle fibers shorten, generating force, following activation by a nerve impulse.

Cross-Bridges

The connection formed between the heads of myosin molecules and actin filaments during muscle contraction.

Tropomyosin

A protein found in muscle tissue that regulates muscle contraction by blocking or exposing binding sites for myosin on actin filaments.