Answer:
The swim bladder is located in the body cavity and is derived from an outpocketing of the digestive tube. It contains gas (usually oxygen) and functions as a hydrostatic, or ballast, organ, enabling the fish to maintain its depth without floating upward or sinking.
Explanation:
I would say C or D
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A proper habitat and Preferences different specialized niches
Answer:
forests maintain a balance between the amount of carbon-dioxide and oxygen gases in the atmosphere...
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The correct answer to your question is the last one; how species change over time.
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