Which of the following statements is true of protoplast fusion?
A) It occurs when the second sperm nucleus fuses with the polar nuclei in the embryo sac.
B) It can be used to form new plant varieties by combining genomes from two plants.
C) It is used to develop gene banks to preserve genetic variability.
D) It is the method of test-tube cloning that produces whole plants from callus.
E) It occurs within a callus that is developing in tissue culture.
Answer: B
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