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24-09-2017
Biology

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Some teratogens have a threshold effect, which means that they are _____.

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07-10-2017

Some of the teratogens have a threshold effect which means that they are harmless up to a certain level. Teratogens may cause a birth defect to a new born baby or in the child. It is a factor or agent that cause malformation of the embryo or fetus.

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