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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).
![Tense laid back ear position indicating unhappiness. Mouth and lips are also tense, which may indica](https://biology-forums.com/gallery/47/medium_27605_22_04_12_7_16_35.jpeg)
![Frederick Douglass, having escaped from slavery in 1836, attracted large audiences as an antislavery](https://biology-forums.com/gallery/47/medium_375348_18_08_15_9_36_29_223002244.jpeg)
![Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many](https://biology-forums.com/gallery/47/medium_27_24_08_15_1_27_04_223942387.jpeg)