Answer:
To avoid Hyper-oxygenation
Explanation:
Crucian carp have the ability to increase gill surface to maximize oxygen intake, or reduce overall area when under specif circumstances. If the fish does not need so much oxygen it will cover the protruding lamellae to reduce oxygen intake and avoid Hyper-oxygenation.
<span>Race represents the convergence of biological factors with geographic origins, and cultural, economic, political, and legal factors. Even though race is believed to be connected to biological factors it really isn't. Scientists have long believed that race should not be tied to genetics or biology. Race should be looked at from cultural and geographic standpoints and other factors. Race is much more a social aspect than a biological aspect.</span>
Your too young sorry dude
The Oldest Son usually takes over
Aye the answer is 2 for sure