Energy is lost as it moves from one trophic level to the next because
A) one trophic level does not consume the entire trophic level below it.
B) some of the calories consumed drive cellular activities and do not add mass.
C) some ingested materials are undigested and eliminated.
D) All of the above are correct.
D
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Which stage in thunderstorm formation is characterized by updrafts accompanied by downdrafts induced by falling precipitation?
A) Cloud merger stage B) Cumulus stage C) Dissipating stage D) Mature stage
The relationship between the dung beetles and the disease-carrying flies is a type of
A) mutualism. B) commensalism. C) intraspecific competition. D) interspecific competition.
The large plates that make up the outer portion of the earth move approximately a few ________ per year
A) millimeters B) micrometers C) meters D) kilometers E) centimeters
The combined influence of CFCs, methane and nitrous oxide as greenhouse gases is insignificant
Indicate whether the statement is true or false