A) Rhizopus
B) Bacterium
C) Cycas
D) Ricinus
Correct Answer: A
Solution :
Heterothallism was discovered by AF Blackeslee (1904) in Rhizopus stolonifer. In this phenomenon, fungi shows fusion of gametes which belong to genetically, morphologically and physiologically dissimilar mycelia normally referred as positive and negative strains.
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