<span>
Long before the contiental drift the cintients was know as pangaea</span>
This decrease of pressure in the thoracic cavity relative to the environment makes the cavity pressure less than the atmospheric pressure. This pressure gradient between the atmosphere and the thoracic cavity allows air to rush into the lungs; inhalation occurs. The resulting increase in volume is largely attributed to an increase in alveolar space because the bronchioles and bronchi are stiff structures that do not change in size.
(3) environmental conditions affect gene
<span>expression</span>
Explanation:
Absolute dating relies on radioactive elements, which are unstable elements that release energy as they break down.
Explanation:
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