Nitrogen fixation (NF) is a crucial step in the nitrogen cycle, converting atmospheric nitrogen into usable forms for living organisms.However, the process is energy-intensive. Which of following statements about nitrogen fixation is NOT necessarily true?
Anonymous Quiz
0%
a) It can be a symbiotic process between bacteria and plants.
33%
b) Lightning strikes provide a natural source of energy for nitrogen fixation.
11%
c) Some free-living bacteria can fix nitrogen independently.
56%
d) Nitrogen fixation primarily benefits plants and has minimal impact on animals.
While the atmosphere is the largest reservoir of nitrogen, most organisms cannot utilize atmospheric N2 directly. However, there are some exceptions. Which of the following organisms can fix atmospheric nitrogen independently?
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15%
a) Nitrifying bacteria (convert ammonium to nitrate)
31%
b) Denitrifying bacteria (convert nitrate back to N2)
38%
c) Free-living bacteria like Azotobacter
15%
d) Plants with specialized root nodules
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*Mahabodhi Temple Complex, Bodh Gaya: One of the four holy sites related to Lord Buddha and a sanctuary of enlightenment!*
📽️Have a look at the sacred splendour of this UNESCO world heritage site, revered as the holiest place of Buddhist pilgrimage and a cradle of Buddhism in the history of mankind!
📽️Have a look at the sacred splendour of this UNESCO world heritage site, revered as the holiest place of Buddhist pilgrimage and a cradle of Buddhism in the history of mankind!
Explanation: Clay can have a very high porosity. Because its grains are very small, there are a lot of (small) pore spaces in between them. What clay does not have is good permeability, which is a measure of how "connected" these pore spaces are. Clay can hold a lot of water, but it doesn't let it flow very well.
Consider the following statements:
1. Coarse sand is more than a million times permeable than a high plasticity clay.
2. The permeability depends on the nature of soil and not on properties of liquid flowing through soil.
3. If a sample of sand and a sample of clay have the same void ratio, both samples will exhibit the same permeability.
4. Permeability of soil decreases as the effective stress acting on the soil increases.
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1. Coarse sand is more than a million times permeable than a high plasticity clay.
2. The permeability depends on the nature of soil and not on properties of liquid flowing through soil.
3. If a sample of sand and a sample of clay have the same void ratio, both samples will exhibit the same permeability.
4. Permeability of soil decreases as the effective stress acting on the soil increases.
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__ has long been known as the ‘Leningrad of Bihar’ or as ‘Mini Moscow’.
Anonymous Quiz
8%
Muzaffarpur
13%
Purnia
68%
Begusarai
13%
Gaya
Symbiotic relationships are close associations between two different species. Mutualism is a symbiotic relationship where both organisms benefit. Which of the following is an example of mutualism?
Anonymous Quiz
4%
a) A lion hunting and consuming a gazelle for food.
26%
b) A tapeworm living inside an animal's intestine and absorbing nutrients.
61%
c) A clownfish living among the tentacles of an anemone for protection.
9%
d) A mistletoe plant growing on a tree and stealing nutrients from its host.
Commensalism is a symbiotic relationship where one organism benefits while the other is neither harmed nor benefitted. Which of the following is an example of commensalism?
Anonymous Quiz
5%
a) A tick feeding on the blood of a deer, causing harm to the deer.
35%
b) Barnacles attached to the shell of a whale, hitchhiking for dispersal.
55%
c) A bee pollinating a flower while collecting nectar for food.
5%
d) A wolf stealing food from a lion's kill, negatively impacting the lion.