Q. Arrange the following in correct sequence with reference to sexual reproduction in $Rhizopus$. I. Formation of germ tube II. Formation of zygophores III. Formation of warty wall layer of zygospore IV. Secretion of trisporic acid
A) IV, III, II and I
B) IV, II, III and I
C) II, I, IV and III
D) I, III, II and IV
Explanation
During sexual reproduction in $Rhizopus$, (+) and (-) strains of mycelia simulate each other through pheromone like trisporic acid to form zygophores. Zygophores of two strains come in contact to form progametangia then coenogametangia. Then after gametangial copulation, zygospores with warty wall layer are formed which germinate in favorable conditions and form a germ tube.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.