Global temperature trends can be inferred from changes in ________ and ________
A) fossils; hydrogen and oxygen isotopes found in sediments and glacial ice
B) volcanic eruptions; isotope ratios in glacial ice
C) fossils; chemical isotopes found in sediments and glacial ice
D) volcanic eruptions; fossils
E) fossils; isotope ratios in glacial ice
C
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In the middle of the eighteenth century in Europe, peasant agriculture was characterized by
A) communal farming practices borrowed from Russia. B) an ever-tightening grip by feudal landlords on the peasants. C) crop rotation that increased yields and soil fertility. D) the first use of the tractor.
Atoms of a particular element that have a different number of neutrons in their nuclei are called
______. Fill in the blank(s) with the appropriate word(s).
Azeris are ________ who speak an Altaic language, but Armenians are Christians who speak an Indo-European language
A) Serbs B) Muslims C) Baptists D) animists E) Hindus
At low (tropical) latitudes, phytoplankton blooms are typically most limited by ________.
A. temperature B. nutrients C. light D. grazing