Biology Questions and Answers
Biogeochemical
Cycles
- What are biogeochemical
cycles?
Biogeochemical cycles arerepresentations of the circulation an (^) d
recycling of matter in nature.
The main bin Ecology are iogeochemical cyclesthe water cycle, th studiede
carbon cycle and the nitrogen cycle.
- What is the respective
importance of water, carbon
and nitrogen for living beings?
Water is the main solvent of living
beings and it is necessary practicallyall biochemical reactions, including as for
reagent of photosynthesis. Many
properties ofor life. f water are very important
Carbon is the main chorganic molecules; carbemical element ofon dioxide is
also reagent of photosynthproduct of the energetic metabolism ofesis and (^)
living beings.
Nitrogen is a fundamental chemicalelement of amino acids, the building (^)
blocks of proteins that in their turn arethe main functional molecules of living
beings; nitrogen is also part of the
nucleic acid molreproduction, heredity and proteinecules, the basis of
synthesis.
- What is the water cycle?
The water cycle represents the
circulation annature. d recycling of water in
Liquid wateheated by the sun and turns into waterr on the planet surface is (^)
vapor that gatmosphere large volumes oains the atmosphf waterere. In the
vapor form clouds that when cooled
precipitate liqTherefore watuid water comes ber as rain.ack to the (^)
planet surface and the cycle is
completed. As possiblcycle, water may still be stored ine steps of the
subterranean reserves or in the form of
ice in mountains analso be used in the metabolism ofd oceans and it may living (^)
beings, incorporated into the body of
the individuals or urine, feces and transpiration.excreted through
- Why is the sun the “motor”
of the water cycle?
The sun can bethe water cycle because upon its energy considered the motor of (^)
the transfowater vapor depends. So the sun is thermation of liquid water into (^)
energy source that causes water to
circulate in nature.
- What is the carbon cycle?
The carbon cyclecirculation and recycling o represents thef the chemical (^)
element carbothe action of living n in nature as a rbeings. esult of
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