Question
In crop rotation, legumes play a vital role due to their
ability to fix atmospheric nitrogen. Which group of microorganisms enables this process in leguminous root nodules?Solution
Rhizobium bacteria form symbiotic relationships with leguminous plants. They colonize root nodules and convert atmospheric nitrogen into ammonia through biological nitrogen fixation, enriching the soil fertility.
The average age of (x + 3) students is 20 years. When their teacher aged 35 years joins them, the average increases by 1 year. Find x% of 400.
Present ages of P and Q are in the ratio 3:5 respectively. If Q’s age, 16 years hence from now will be 6 times of P’s age, 6 years ago from now, the...
The current age ratio of 'Ganesh', 'Hitesh', and 'Indira' is 5:7:6. In 8 years, the ratio of the ages of 'Ganesh' and 'Hitesh' wi...
Five years ago from now, ratio of ages of Sohan and Mohan was 3:5, respectively. If 5 years hence from now, ratio of their ages will be 7:10, then find ...
Pawan is 8 years younger than 'Qureshi' and 8 years older than 'Raju'. The current age ratio of 'Qureshi' to 'Raju' is 3:2. What ...
The ratio of the present ages of father and his son is 5:2. The product of their ages 4 years ago was 31 times of his son’s age that year. What wa...
- Five years ago, the ratio of age of ‘A’ to ‘B’ was 4:5. Seven years from now, their age ratio will be 6:7. Find the present age of ‘Z’, who is ...
Sum of the present ages of A, B, C and D is 40 years. After 6 years ratio of their ages is 6:5:3:2. What is C’s present age?
The total age of A, B and C five years hence will be 84 years. Find the age of C three years hence, if the present age of A and B is 34 years and 23 yea...
Amit age after 15 years will be 2 times his age 2 years back. What is the present age of Amit?
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