8.Microbes in Human Welfare
medium

જૈવિક ખાતરોનાં મુખ્ય સ્ત્રોતો

$(a)$ બેક્ટરિયા

$(b)$ સાયનોબેક્ટરિયા

$(c)$ ફૂગ 

$(d)$ પ્રોટીસ્ટ

A

$(a), (b), (c)$

B

$(a), (b), (d)$

C

$(b), (c), (d)$

D

$(a), (c), (d)$

Solution

The main source of biofertilisers are
Bacteria -Photoautotrophs and chemoautotrophs; free-living and symbiotic forms
Cyanobacteria $e.g.$, Nostoc & Anabaena
Fungi increases surface area for absorption.

Standard 12
Biology

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