Because people are always growing and being born.
The normal skin color would vary the normal body temperature would be 98.6
alleles of the same trait separate during meiosis
Explanation:
Tophi is a deposition of the mono sodium urate crystals who has high level of uric acid in the blood. This conditions known as hyperuricemia.
Tophi are indication of gout. Most of the people suffering from tophi might have previous attack of arthritis which eventually leads to tophi.
This is really painful and most of the pain occurs in the joints of the body.
If capillaries were thicker, nutrient and gas transfer would be much more difficult. Capillaries are only one cell thick so that it is easy for gases (oxygen and carbon dioxide), nutrients, and wastes to diffuse into and out of the blood. If they were thick, this diffusion would be much harder or impossible.