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Topics > Biology > Botany

	Project title	What are bioassays and how effective are lettuce seeds as bioassays?
	Difficulty Level	High school
	Main link	Click here to view all details of this science project (Cached) (View 3rd party site)
Description
The idea behind a reference toxicity test is that the test organism, in this case lettuce seeds, will respond in a predictable manner to varying concentrations of a particular chemical compound. At some threshold concentration, all of the test organisms will be killed (or in this case, none of the lettuce seeds will sprout). In solutions that are more dilute, some level of inhibition will occur in seed germination and/or radicle length. If the concentration is low enough, no response will be detectable.
Materials
This idea is contained in a third-party website. To view the science fair projects, please click on the link above. Copyright in the third party website belongs to the relevant author.
Brief Instructions
[Please see third-party website for instructions]

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