MEDIUM
9th ICSE
IMPORTANT
Earn 100

Observe the diagram and answer the following questions. How can root nodules advantageous for plants?



Important Questions on Economic Importance of Bacteria and Fungi
EASY
9th ICSE
IMPORTANT
Observe the diagram and answer the following questions. Give examples of leguminous plants and the bacteria that live in association with it.

EASY
9th ICSE
IMPORTANT
A. Antibiotics do not work against viruses.
B. All the antibiotics are obtained from bacteria.
C. Ephedrine and flavicin are extracted from Streptomyces sp.
D. Antibiotics kill or retard the growth of other microbes.

EASY
9th ICSE
IMPORTANT
Choose the incorrect ones.
A. Denitrifying bacteria are capable of transforming nitrates to nitrogen.
B. Rhizobium and Azotobacter are ammonifying bacteria.
C. Nitrification converts ammonium compounds into nitrites and nitrates.
D. Nitrobacter is a nitrogen-fixing bacteria.

MEDIUM
9th ICSE
IMPORTANT
I. Citrus canker — Xanthomonas citri.
II. Tundu of wheat — Corynebacterium tritici.
III. Blight of rice — Xanthomonas oryzae.
IV. Angular leaf spot of cotton — X. malvacearum.
V. Anthrax of cattle — Bacillus anthracis.
VI. Whooping cough — Bordetella pertussis.

EASY
9th ICSE
IMPORTANT
