The first transgenic plants expressing engineered foreign genes were tobacco plants produced by the use of a) Agrobacterium tumefaciens. (6) Bacillus thuringiensis. (c) Arabidopsis thaliana (d) Streptomyces hygroscopicus. 2. The controversy regarding the use of Bt corn is that it: (a) is potentially harmful to monarch butterflies. (6) is a potential allergen to humans. (c) can contaminate groundwater. (d) both (a) and (b). 3. In angiosperms, the endosperm is: a) haploid (6) diploid (c) triploid (d) none of these 4. Transgenic plants: (a) contain foreign genes in their cells. (6) are used to produce human antibodies. (c) both (a) and (b). (d) are plants that differ in geographical locations. 5. Which cell-based plant technology involves the combining of two cells without cell walls from different species? (a) Clonal propagation (b) Cybridization c) Protoplast fusion Mutant selection

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