Question

A. Name two important macronutrients which are made available for plants by biofertillizers.
B. Name the cyanobacterium which forms symbiotic association with Azolla.
C. Give the names of the partners which form symbiotic association in the following: (i) Lichen (ii) Mycorrhiza (iii) Root nodules (iv ) Coralloid roots.
D. Give the name of bacterium which was used as first biopesticide on a commercial scale in the world.

Answer 1

A. Phosphorus and Nitrogen.
B. Anabaena azollae
C. i Lichen-Algae and Fungi. Ii Mycorrhiza-Fungi and roots of higher plants, iii Root nodules-Rhizobium sp and roots of leguminous plants iv Coralloid root-Nostoc and Cycas roots.
(D). Bacillus thuringiensis.