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<span>RATIONALE: </span>
<span>The patient with chronic obstructive pulmonary disease (COPD) develops a barrel chest over time because trapped air enlarges the lungs and thoracic cavity, thereby reducing chest flexibility. Sunken chest, also known as funnel chest or pectus excavatum, is not related to COPD. Hyperventilation is not characteristically seen with COPD. Instead, the patient usually displays persistent dyspnea on exertion, with or without a chronic cough. Circumoral cyanosis is a bluish discoloration of the skin surrounding the mouth. It is usually an indication of a severely diminished level of oxygen and respiratory distress. Circumoral cyanosis can result from a variety of respiratory diseases and may be a late sign of the COPD disease process.
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Dalton's atomic theory said, apart from other things, said that an atom was the smallest things and that all matter was composed of atoms.
But J. J. Thomson discovered the electrons, particles smaller than atoms, and after that, changes to Dalton's theory were made.
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-because distinct populations of living things exist due to barriers to reproductive change.
-because fossils may be classified into distinct taxa due to the persistence of gaps.
The two reasons why the gaps among existing organisms, as well as the fossil records have remained after hundreds of years of research are because of distinct populations of living things exist due to barriers to reproductive change and because fossils may be classified into distinct taxa due to the persistence of gaps.
Answer:
After C14, Uranium238 is most widely used mineral in geological or archaeological dating.
Explanation:
U238 is generally used to date the rock materials, to know the age. As we know the half-life of U238, it is easy to identify the age of the materials containing uranium 238. It can be called as absolute dating method as it determines the exact age of the uranium contained material. It is a type of radiometric dating.
Explanation:
In medicine, a condition is considered asymptomatic if the patient is a carrier of a disease or infection but does not experience symptoms. A condition can be asymptomatic if it does not present the noticeable symptoms with which it is normally associated. Asymptomatic infections are also called subclinical infections. Other conditions (such as mental illness) may be considered subclinical if they present some but not all of the symptoms required for a clinical diagnosis. The term clinically silent is also used.
