Tag: bio-geo chemical cycles in nature

Quizzes (5) Questions (95)

Questions Related to bio-geo chemical cycles in nature

Multiple choice zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

The bacteria ______ supply natural manure to paddy fields.

  1. Azolla

  2. Anabaena

  3. Azotobacter

  4. Nostoc
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The bacteria Azolla supplies natural manure to the paddy fields. Azolla is a gliding pteridophyte, which contains as endosymbiont the nitrogen-settling cyanobacterium Anabaena azollae (Nostocaceae family). 
Generally developed in the Asian districts, Azolla is either consolidated into the dirt before rice transplanting or developed as a double product alongside rice. 
So, the correct answer is A.
Multiple choice zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

The ozone at ground level is primarily from__________ precursors

  1. Fossil fuel

  2. $CFC _{S}$

  3. Oxygen

  4. Methane
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ground-level ozone is a secondary pollutant formed by the reaction of nitrogen oxides and volatile organic compounds in the presence of sunlight, both of which are primarily emitted by fossil fuel combustion.