Biogeochemical cycles involve
A) only biological processes.
B) heat loss from both respiration and photosynthesis.
C) only geological and chemical processes.
D) the cyclic movement of materials through all planetary ecosystems.
D
You might also like to view...
Local names of this biome include the Chaco, the Caatinga, the brigalow, and the dornveld
A) tropical rain forest B) tropical seasonal forest and scrub C) Mediterranean shrubland D) Arctic and alpine tundra
What is the main problem that has developed in the Ogallala aquifer?
A. Precipitation is heavier to the east, causing tilting of the entire formation. B. It has become contaminated with radioactive waste from the Chernobyl accident. C. Overpumping may cause southern parts of the aquifer to go dry in the next 100 years. D. None of these choices are correct.
Since the surface weather map is a sea-level chart, which of the following gives another name for a surface weather map?
A. constant pressure chart B. constant height chart C. constant latitude chart D. isobaric chart
Interglacial periods commonly are periods of regression. Indicate whether the statement is true or false