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Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Conventional color wheel Conventional color wheel
The Phytochemical Color Guide The Phytochemical Color Guide
The phenotypic distribution in a cross with two traits: seed color and seed shape. Plants in the F2 The phenotypic distribution in a cross with two traits: seed color and seed shape. Plants in the F2
A theoretical explanation of the biochemical basis of the four eye color phenotypes A theoretical explanation of the biochemical basis of the four eye color phenotypes
Polygenic inheritance of wheat kernel color controlled by two additive genes Polygenic inheritance of wheat kernel color controlled by two additive genes
Genetic complementation analysis of Drosophila eye color mutants Genetic complementation analysis of Drosophila eye color mutants
Video: Stretch reflex & Tendon reflex

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