Q1). Farmers in Northern india grow a leguminous crop between two successive cereal crops
a. What is this practice called?
b. Why only leguminous plants are selected for this practice?
Q2).a Define bioaugmentation
b. Name the biological nitrogen fixer which fixes atmospheric nitrogen in the roots of leguminous plants
c. Name the organism which fixes atmospheric nitrogen in the roots of leguminous plants
q.3 disease caused by
1. bacteria in cattle
2. virus in humans
q4. disease causing rice grains to become greenish back
pls help me tomorrow is my exam
Answers
Q2)c) rhizobium bacteria which are attached to the roots of leguminous plants help in nitrogen fixation
Explanation:
Q3)1) anthrax
2) AIDS
Answer:
The concept is based on the crop growing practices.
Explanation:
1. a) The practice is called crop rotation in which farmers grow different crops in successive years to maintain the fertility of land.
b) A leguminous crop absorbs atmospheric nitrogen, using bacteria that remove nitrogen. It helps in adding nitrogen to the soil without adding extra fertiliser to the soil.
2. a) Bioaugmentation is the process of adding grown microorganisms to the subsurface for the purpose of biodegrading different pollutants in soil and groundwater.
b) Rhizobia bacteria in root systems within nodules of leguminous planst, creating nitrogen compounds that help the plant grow and compete with other plants.
c) Rhizobia bacteria in root systems within nodules of leguminous planst, creating nitrogen compounds that help the plant grow and compete with other plants.
3. 1.Diseases in animals caused by bacteria are blackquarter, anthrax and tuberculosis.
2. Viruses cause severe illnesses such as smallpox, ebola and HIV/AIDS.
4. The disease called Rhizonctonia solani causes rice grains to become greenish black spots.
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