Multiple Choice QuestionsAssertion: Soil particles, particularly clay and organic matter in soil, contain negative charges that attract positively-charged ions such as Ca2+, K+ and Mg2+.
Reason: Essential elements derived from soil are termed as mineral elements while those derived from air or water are known as nonmineral elements.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Atmospheric nitrogen gas is always fixed by nitrogen-fixing micro-organisms.
Reason : Decomposers release nitrogen gas from dead bodies of plants and animals.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
D.
If both assertion and reason are false
Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia (NH3) or related nitrogenous compounds. Nitrogen- fixing bacteria is a micro- organisms which is capable of transforming atmospheric nitrogen into fixed nitrogen. More than 90 percent of all nitrogen fixation is effected by these organisms, which thus play an important role in the nitrogen cycle. Decomposers are the organisms that break down dead or decaying organisms. They use organic substrates in order to obtain their energy, carbon and nutrients for growth and development.
Apiculture is associated with which of the following groups of plants
Grapes, maize, potato
Sugarcane, paddy, banana
Guava, sunflower, strawberry
Pineapple, sugarcane, strawberry
Leghaemoglobin is produced in response to
respiration
photosynthesis
fatty acid synthesis
N2 fixation
Assertion : Cattles feed on leaves of maize to get nutrition for growth and development.
Reason: A number of symbiotic bacteria are present in rumen of cattle.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are hue but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
In the given diagram A and B represent
| A | B |
| Mineralisation | Demineralisation |
| A | B |
| Ammonification | Denitrification |
| A | B |
| Denitrification | Ammonification |
| A | B |
| Denitrification | Mineralisation |
Which of the following is correct set of micronutrient for plants?
Mg, Si, Fe, Cu, Ca
Cu, Fe, Zn, B, Mn
Mg, Fe, Zn, B, Mn
Mo, Zn, Cl, Mg, Ca
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