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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

For linked genes, recombinant frequencies are less than 50 percent For linked genes, recombinant frequencies are less than 50 percent
Red-Green Color Blindness Is a Sex-Linked Trait in Humans Red-Green Color Blindness Is a Sex-Linked Trait in Humans
Linked versus unlinked genes Linked versus unlinked genes
A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction ... A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction ...
Frequency of X-Linked Recessive Traits in Males and Females Frequency of X-Linked Recessive Traits in Males and Females
Sturtevant’s Recombination Data for Five X-Linked Genes in Drosophila Sturtevant’s Recombination Data for Five X-Linked Genes in Drosophila
Video: The 4 steps of translation Animation

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