<span>The man has been contracted with pseudo membranous colitis which is the result of taking broad-spectrum antibiotics for an infection caused by a gunshot wound to the abdomen; this is because normal micro biota is wiped by the antibiotics resulting the overgrowth of Clostridium difficile in colon.</span>
False. <span>Secondary succession mainly occurs after an event, and it takes place on the same soil .</span>
<h3><u>Answer;</u></h3>
Divergent evolution;
<h3><u>Explanation;</u></h3>
- Divergent evolution is the process of two or more related species becoming more and more dissimilar. In this type of evolution groups of species from the same common ancestor evolve and accumulate differences, resulting in the formation of new species.
- For example; <em><u>The red fox and the kit fox. The red fox and the kit fox both have a common ancestor but have gone through the process of divergent evolution. It has adapted to its mixed farmland and forest environment. Its red color helps it to blend in with the trees. </u></em>
- <em><u>The kit fox is sandy in appearance because it lives in the desert. It also has larger ears than the red fox and its larger ears help the fox release excess body heat in the desert.</u></em>
An increase in volume DECREASES the pressure in the chest (pressure and volume vary inversely when temperature is held constant -- Boyle's law). Gas can only flow from an area of higher pressure to an area of lower pressure. It can't go uphill -- ever. It can only go from high to low pressure. When the diaphragm and intercostals contract, the diaphragm flattens and the rib cage rises. That increases the volume of the chest. That increase in volume decreases the pressure inside the chest (temperature is held constant -- because the temperature of the chest cavity does not change appreciably. It remains at body temp.). Air then flows from the area of higher pressure (atmospheric) to lower pressure (intrathoracic). That continues until the pressures are equal.
When the diaphragm and intercostals relax, the chest cavity decreases in size, the pressure increases to above atmospheric, and gas flows again from the area of higher pressure (intrathoracic) to lower pressure (atmospheric) until they are again equal.
It has nothing to do with the concentration of oxygen. You can ventilate a lung with ANY gas. It has to do with the change in pressure and only the change in pressure -- which is a function of the volume of the chest cavity.
