<span>Lynn Margulis supported the endosymbiotic theory and
studied mitosis in cells. She was an American evolutionary theorist who made
great significance in the symbiosis of organisms in biological evolution. She
is also a developer of the Gaia Theory, which believes that the Earth functions
as a single self-regulating system. </span>
<span>People who are infected with
AIDS has more tendency to acquire multiple infections because the pathogen that
causes acquired immunodeficiency
syndrome (AIDS) damages the immune system of a patient by destroying the white
blood cells that fight infection. If the CD4</span>+ T cell count below 200 cells per µL and presence of
specific diseases in association with an HIV infection are observe in an
individual, then this could be an indication of having an AIDS.
Moreover, opportunistic
infections or cancer may take advantage of a very weak immune system, an
individual can develop an influenza-like illness with signs and symptoms that
includes swollen lymph nodes, fever, rash, weight loss, diarrhea and cough.
2) One value might be distorted; for example it is usual that a heard rate right after sitting down can be higher than the rest rate. Other factors that might affect this is the rate of breathing, exercise. We also have that some bleeding can affect this. Finally, the point that you use to measure the heart rate can also be important in making correct measurements.
1)Taking multiple heart rates leads to more reliable results because you can use the mean and not a single value that might be far off it. You avoid thus the effects of the factors above that happen often enough so that we would appear to be ill many times when we are perfectly healthy; In scientific terms, there is some variance in measurements and that is fine.
3) Even if their resting heart rates are the same, they can react differently to stress. One reason is having low iron in your blood; it is essential for transferring oxygen in your blood and thus it is esssential when one does gymnastics. A person with low iron will have a higher pulse to accomodate his cells' needs for oxygen. The same applies to persons with breathing problems or different fitness (even if the resting heart rate is the same). Also, there could be the case that genetically one has less mitochondria and this also affects oxygen and blood needs in exercise.
4) The average rate for adults is 60-100 beats per minute. While this is not abnormal, it is rather high. An examination might be advised to see what leads to such a high bpm rate. If this yields nothing, it could be that due to age and physics reasons this is normal.
<span>The lack of melanin tends to correlate with a lighter skin color. However, it also correlates with a higher susceptibility to receiving a sunburn. The more often a person burns, the more likely it is that a person will be susceptible to skin cancers later on in life.</span>
