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Author Question: Two nuclei which share the same mass number A always are (Hint: Eliminate any wrong answers.) (Read 52 times) |
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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There are more sensory neurons in the tongue than in any other part of the body.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").