match the letters to the decriptions

________is the process by which plants absorb a portion of their nutrients fromsenescing tissues to be stored and used for the production of newtissues.

The breakdown of chemical bonds that were formed during the construction of plant and animal tissues is called ________.

The release of organically bound nutrients into an inorganic form is called ________.

The introduction of high levels of nutrients into a body of water is called ________.

Precipitation brings appreciable quantities of nutrients into ecosystems that are collectively called ________.

Largequantities of nutrients are bound tightly in ________ structure; theyare not readily available until released by the activities ofdecomposers.

Some nutrients are ________ from the soil and carried out of ecosystems by underground water flow to streams.

Theelement ________ is a basic constituent of all organic compounds and isinvolved in the fixation of energy by photosynthesis.

Thedifference between the rate of carbon uptake in photosynthesis and therate of carbon loss due to autotrophic and heterotrophic respiration isthe net ________ productivity.

Nitrogen is generally available to plants in only two forms: ammonium and ________.

Biological nitrogen fixation is accomplished by symbiotic ________ living in mutualistic association with plants.

Nitrogencan be returned to the atmosphere when certain bacteria convert it fromnitrate into nitrogen gas, which is a process called ________.

Microbial decomposition of organic matter results in NH₄+ production through a process called ________.

Nearly all of the phosphorus in terrestrial ecosystems comes from the ________ of calcium phosphate minerals.

___________ develop as a result of incomplete decomposition of organic matter in swamps and marshes.

The process of ____________ produces a form of nitrogen that is easily lost from soil through leaching.

____________ is when too much nitrogen enters an ecosystem and causes forest decline.

_________ primary productivity is the total rate of photosynthesis or energy assimilated by plants.

Plants assimilate energy through the process of _______________.

___________is the process that releases carbon dioxide in the atmosphere.

A.	nitrogen saturation
B.	leached
C.	weathering
D.	decomposition
E.	gross
F.	organic
G.	nitrification
H.	retranslocation
I.	respiration
J.	denitrification
K.	nitrate
L.	bacteria
M.	fossil fuels
N.	net
O.	ecosystem
P.	mineralization
Q.	ammonification
R.	photosynthesis
S.	wetfall
T.	carbon
U.	eutrophication