In maize, hybrid vigour is exploited by

  • A

    Bombarding the seeds with $DNA$

  • B

    Crossing of two inbred parental lines

  • C

    Harvesting seeds from the most productive plants

  • D

    Inducting mutations

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The bacterium responsible for biogas production are collectively called

Sunhemp is obtained from

Clove oil is obtained from

Match the columns :

Column - $I$ Column - $II$
$(a)$ Aspargillas Nizer $(1)$ Lactic acid
$(b)$ Aceto bacter aciti $(2)$ Citric acid
$(c)$ Clostridium butiricum $(3)$ Acetic acid
$(d)$ Lacto bacillus $(4)$ Buteric acid

 

Woodruf ($1941$) were responsible for the isolation of