The structure that is directly involved in gas exchange during respiration would be the alveoli. These are tiny sacs located in the lungs that enable oxygen and CO2 to move through the lungs and the bloodstream. Its main function is for gas exchange. It allows oxygen to diffuse into the blood for transport to tissues and remove carbon dioxide from it as well.
Its a 50/50 so two of there kids will have blue eyes and two will be brown eyes but the children with brown eyes with be heterozygous for blue eyes and same thing with the brown eye children
Since the earth is rotating while this is happening, two tides occur<span> each day. When the sun and moon are aligned, there are exceptionally strong gravitational forces, causing very </span>high and very low tides which are called spring tides, though they have nothing to do<span> with the season.
</span><span>As the earth rotates on its axis once every 24 hours, if the moon stood still then the moon will be overhead and 'underfoot' once in every 24 hours giving (in most places) 2 </span>high<span> and 2 low </span>tides<span> a day, but as the moon is also orbiting in the same direction as the earth revolves it actually takes about 24 hours and 50 ...</span>
