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9th ICSE
IMPORTANT
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Observe the diagram and answer the following questions. How can root nodules advantageous for plants?

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Important Questions on Economic Importance of Bacteria and Fungi

EASY
9th ICSE
IMPORTANT
All In One ICSE Biology>Chapter 8 - Economic Importance of Bacteria and Fungi>Chapter Exercise (Diagram based question)>Q 23

Observe the diagram and answer the following questions. Give examples of leguminous plants and the bacteria that live in association with it.
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EASY
9th ICSE
IMPORTANT
All In One ICSE Biology>Chapter 8 - Economic Importance of Bacteria and Fungi>Challengers (MCQ)>Q 1
Given below are few statements about the antibiotics obtained from microorganisms. Read them carefully and mark the option containing the correct one(s).
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
All In One ICSE Biology>Chapter 8 - Economic Importance of Bacteria and Fungi>Challengers (MCQ)>Q 2
Bacteria are known to increase the fertility of soil through different processes that help the plants to absorb nitrogen. Given below are few statements regarding the processes.
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
All In One ICSE Biology>Chapter 8 - Economic Importance of Bacteria and Fungi>Challengers (MCQ)>Q 3
Which of the following is a correct pair of bacterial disease and its causal agent?
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
All In One ICSE Biology>Chapter 8 - Economic Importance of Bacteria and Fungi>Challengers (MCQ)>Q 4
A mycorrhiza is a mutualistic association between a fungus and a plant's roots. Which statement best characterises this association?