biology
cycles
ecology
Random
100
cellular respiration
How is carbon dioxide made by producers and consumers?
100
Fossil fuels, like oil, gas and coal, form when organic material is preserved
What are fossil fuels?
100
Ecology is the field of Biology that studies the relationship between living beings and between living beings and the environment.
What is Ecology?
100
is the contamination of an ecosystem by factors that are harmful for the equilibrium of its biotic or abiotic constituents.
What is pollution?
200
carbon is the main chemical element of organic molecules; carbon dioxide is also reagent of photosynthesis and product of the energetic metabolism of living beings.
2. What is the respective importance of water, carbon and nitrogen for living beings?
200
The nitrogen cycle represents the circulation and recycling of the chemical element nitrogen in nature.
What is the nitrogen cycle?
200
A species is a set of living beings able to cross among themselves generating fertile offspring.
What is a species?
300
photosynthesis
What is the main biological process that consumes carbon dioxide?
300
Bio-geochemical cycles are representations of the circulation and recycling of matter in nature
What are bio-geochemical cycles?
300
A population is a set of individuals of the same species found in a given place in a given time.
What is a population?
400
is molecular nitrogen (N2). The air is 80% constituted of molecular nitrogen.
What is the most abundant form under which nitrogen is found in nature?
400
Biotic factors are living beings (plants, animals and microorganisms) that are part of a given environment.
What are biotic factors?
400
The mains chemical compounds that destroy the ozone layer are the CFCs, chlorofluorocarbons, or freons, substances used in the past in refrigerators, airconditioners and spray cans.
What are the main chemical compounds that destroy the ozone layer?
500
plants fix nitrogen from ammonia.
Under which form is nitrogen fixed by living beings?
500
by photosynthesis
What are the processes that autotrophic beings use to produce organic material from inorganic substances?
500
Ozone, O3, is a gas of the atmosphere that filters ultraviolet radiation from the sun disallowing most of that radiation from reaching the surface of the planet.
What is the role of the ozone layer for living beings?
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