Thchemical elements that aravailablto producers arusually in what form?
A) ions
B) gases
C) solids
D) compounds
E) hydrocarbons
Correct Answer:
Verified
Q85: Which of thfollowing does NOT cyclthrough an
Q86: Thgreatest concentration of nitrogen on earth is
Q87: Which plants argrown to increasthamount of nitrogen
Q88: Energy pyramids archaracteristic of ecosystems because
A)not all
Q89: Most of thcarbon now present in thearth's
Q91: Air pollution
A)reduces visibility.
B)corrodes buildings.
C)causes various human diseases.
D)damages
Q92: Which of thfollowing statements is FALSE?
A)Ecologist use
Q93: Which of thfollowing is not a greenhousgas?
A)methane
B)oxygen
C)carbon
Q94: Carbon dioxidin thatmosphere
A)is destroying the ozone layer.
B)has
Q95: Most of thwater vapor in thearth's atmosphercomes
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