Which gene is added downstream from the left border to prevent unwanted vector DNA past the left border from being incorporated into transgenic plants.

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#Question id: 16488

#12. Applied Biology

Advantages of organ culture are

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#Question id: 3619

#8. Inheritance Biology

Alleles that are both expressed in a heterozygote are

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#Question id: 19044

#13. Methods in Biology

Which of the following techniques would be most useful to identify as well as quantify the presence of a known impurity in a drug substance? 

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#Question id: 5024

#11. Evolution and Behavior

Which statement is most consistent with the hypothesis that the Cambrian explosion was caused by the rise of predator-prey relationships?

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#Question id: 3626

#8. Inheritance Biology

The major blood group locus in humans produces types A (genotypes AA or AO), B (genotypes BB or BO), AB (genotype AB), or O (genotype OO). Parents who are type AB and type O, what are the possible blood types of their offspring?