MCQ
Thurioside is a proteinaceous toxin which is obtained from:
- ABiofertilizer
- BFarmyard manure
- CGreen manure
- DBacterial origin
Explanation:
Thurioside is a toxin produced by the bacterium Bacillus thuringiensis. Thus, it is of bactericidal origin. It is used as a bio-insecticide, as it is highly effective against disease causing insects like flies, moths, mosquitoes etc. If consumed by mistake, it acts as a stomach poison
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$(a)$ Heterospory
$(b)$ Endosporic development of gametophyte
$(c)$ Reduced gametophyte
$(d)$ Localization of sporangium bearing appendages in strobili
$(e)$ Unisexual gametophytes
$(f)$ Fertilization with the help of water