For a fish to be buoyant, or float, it must displace less water or the same amount of water as its own body mass. ... Many fish use swim bladders to help them with quick depth changes. These bladders fill with air to help fish rise or release air so fish can sink, often in conjunction with forward movement.
1.) <span>Abelhas, ir, flor, flor, obter, néctar
</span>2.)
<span>Um certo tipo de bactérias vive no intestino humano
</span><span>Desculpe, as palavras podem ser estranhas. Eu usei o Google Tradutor:)</span>
The troposphere is shallowest or narrowest at the poles, and deepest or thickest at the equator. At the geographic North and South Poles, the troposphere reaches only 4 miles high, while at the equator, it extends nearly 12 miles high.
