The degradation of which cells will cause an individual to develop tay-sachs?
neurons
skin cells
muscle cells
fat cells

answer: tay-sachs disease is a progressive fatal genetic condition that affects the nerve cells in the brain. people with tay-sachs lack a specific protein that causes a certain fatty substance to build up in the brain -- it is this accumulation that causes the symptoms of tay-sachs. tay-sachs usually strikes in early life (3-6 months of age) but can also not appear until youth (under age 10) or strike in adulthood. this article further explains the symptoms, life expectancy, diagnosis, and where to learn more about tay-sachs disease.

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the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.