I. Energy - see this summary!
B. How living things obtain energy-cell respiration
glucose about 36 molecules
d. The energy of ATP can then be used to do cell work for whatever the cell needs
2. What organisms respire? All of them
C. The important thing to remember about energy: once it has been used by a cell to do work, it cannot be used again...ever...by any organism
SUN -> EARTH -> PRODUCERS -> 1o CONSUMERS -> 2o CONSUMERS -> ETC. Resp Resp Resp heat heat heat heat
2. Food chains demonstrate the linear nature of energy
II. Matter
B. Carbon cycle
3. Carbon is released from living things to the physical environment by respiration
4. The carbon cycle on land (a similar cycle exists in aquatic ecosystems)
2. Nitrification- conversion of ammonium to nitrate (NO3-)
3. Assimilation- the intake of either ammonium or nitrate by plants and its conversion to protein and other N-containing compounds
4. Ammonification- the conversion of organic nitrogen (in animal wastes and in dead organic matter) to ammonium (NH4+)
5. Denitrification- the conversion of nitrate to nitrogen gas
D. Additional cycles included the
oxygen cycle and the
phosphorous cycle
E. The following are [REQUIRED READINGS]:
water cycle
and the ecological role of the carbon and nitrogen cycles. Finally, read
about the
global
carbon cycle
Other Sites of Interest:
Summary
of energy flow in an ecosystem
Ecosystems
Energy flow
and productivity
Comparison
of respiration and photosynthesis
Review
of respiration and photosynthesis
Biogeochemical
cycling as an environmental problem
glycolysis-
step through, has video
glycolysis
step by step