PEE 3m
It is needed to make proteins and nucleic acid such as DNA.
Nitrogen
is one of the primary nutrients for the survival of all living organisms.
Nitrogen
Nitrogen makes up about __% of the Earth’s atmosphere surrounding all living things.
78%
makes up about 78% of the Earth’s atmosphere surrounding all living things.
Nitrogen
The process of converting nitrogen into different form is called
Nitrogen Cycle
nitrogen to be available to make biologically important compounds
must first be converted into a different chemical form.
PROCESSES IN NITROGEN CYCLE
Nitrogen Fixation
Nitrification
Assimilation
Ammonification
Denitrification
in the atmosphere falls to the earth by precipitation.
Nitrogen Fixation (N2)
Once it is in the soil, nitrogen fixing-bacteria turns nitrogen gas (N2) into ammonium (NH4) by breaking nitrogen bonds using enzyme nitrogenase and combining it with hydrogen atoms.
Nitrogen Fixation
Additional nitrifying bacteria convert nitrite to nitrate
Nitrification
is the process that converts ammonium to nitrite and then to nitrate
Nitrification
Nitrate can now be used and absorb by plants and animals. This process is called
Assimilation
In animals, nitrate is assimilate by eating plants or other animals.
Assimilation
In plants, nitrate is absorb through the roots and use in the synthesis of nucleic acid, amino acids, protein and chlorophyll.
Assimilation
Some fungi and bacteria decompose tissue and release inorganic nitrogen back into the ecosystem as ammonia in the process known as ammonification.
Ammonification
When an organism excretes waste or dies, the nitrogen is in the form of organic nitrogen.
Ammonification
is the process that converts nitrate to nitrogen gas (N2) , thus removing bioavailable nitrogen and returning it to the atmosphere.
Denitrification
A process that occurs naturally in a bodies of water because of the presence of nutrients (phosphate and nitrate) that stimulate growth of algae and result in oxygen depletion.
EUTROPHICATION
Human activity speeds up the
eutrophication process
________ and ________ make algae grow
Phosphates and nitrates
Too much algae will consume
Oxygen