In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrients to enter the cycle?
Correct Answer:
(C) Phosphorus cycle
Phosphorus is a chemical element found on Earth in numerous compound forms, such as the phosphate ion (PO43¯), located in water, soil and sediments. Much of the phosphorus on Earth is tied up in rock and sedimentary deposits, from which it is released by weathering, leaching, and mining. Some of it passes through freshwater and terrestrial ecosystems via plants, grazers, predators, and parasites, to be returned to those ecosystems by death and decay. Much of it, however, is deposited in the sea, in shallow sediments, where it circulates readily, or in ocean depths, whence it wells up only occasionally. Phosphorus is brought back to the land through fish harvests and through collection of guano deposited by seabirds.
Ques: 2
What is the possible path of nitrogen movement?
Correct Answer:
(B) Air-soil-plants-animals-soil-air
The path of nitrogen movement, starting from the air and ending back in the air, involves a cycle of transformation and movement through various ecosystems. Here's a breakdown of the possible path: Air to Soil, Soil to Plants, Plants to Animals, Animals to Soil, Soil to Air.
Ques: 3
Major biogeochemical cycle includes:
Correct Answer:
(D)
All a, b and c
A biogeochemical cycle, or more generally a cycle of matter, is the movement and transformation of chemical elements and compounds between living organisms, the atmosphere, and the Earth's crust. Major biogeochemical cycles include the carbon cycle, the nitrogen cycle and the water cycle.
Ques: 4
Consider the following statements with respect to Biochemical Cycle:
It is the way in which an element or compound moves between its several biotic and abiotic forms and locations in the biosphere.
It starts by absorbing the chemical elements by the organism and is returned to the air, water, and soil through decomposition.
Which of the above statements is/are correct?
Correct Answer:
(C) c) Both 1 and 2
Ques: 5
Which of the following are correct about Types of Biochemical cycles?
In the gaseous cycle, the main reservoir is the soil and the sedimentary and other rocks of the earth’s crust.
In the sedimentary cycle, the main reservoir of nutrients is the atmosphere and the ocean.
Select the correct answers using the codes given below: