What does the deep red color in this soil profile suggest?
A) Magnesium is present because the area was recently submerged beneath a shallow sea
B) Glaciers have scoured the landscape
C) Iron-bearing minerals have been leached downward
D) The soils are water logged most of the time
E) There is an extreme amount of organic material throughout the profile
C) Iron-bearing minerals have been leached downward
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The last 2.6 million years are known as the
A) Jurassic Period. B) Devonian Period. C) Quaternary Period. D) Cretaceous Period.
Air masses that migrate far from their source regions become modified in physical characteristics and form secondary air masses
Indicate whether the statement is true or false
The big losers from bioprospecting are typically
A) indigenous peoples. B) corporations. C) urban populations. D) coastal populations. E) core populations.
Oxygen, O, (number 8), sulfur, S, (number 16), and selenium, Se, (number 34 ) have such similar chemical properties because
A) their outermost shells contain the same number of electrons. B) because they are all located close to one another in the periodic table. C) they all have the same number of occupied shells. D) These elements can't have similar chemical properties because they are in different periods of the periodic table.