Which of the following causes excessively high levels of toxic chemicals in fish-eating birds? 

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#Question id: 761

#XL - Q Biochemistry

In a DNA double helix each type of base forms a stable base pair with only one type of base. When bases on an RNA strand are involved in base pairing, which bases can form stable base pairs with more than one type of base?

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#Question id: 431

#XL - R Botany

Which is not generally a molecule used to conserve energy?

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#Question id: 19602

#XL - P Chemistry

If liquids A and B form an ideal solution

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#Question id: 19948

#XL - P Chemistry

The fundamental particles which arc responsible for keeping nucleons together is

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#Question id: 13033

#XL - Q Biochemistry

The sample is then fractionated by electrophoresis through a _______. As all the proteins now have an _______ to mass ratio, they are separated on the basis of their _____.