select the BEST explanation of why there are so few top-level Oa. Because they h
ID: 254690 • Letter: S
Question
select the BEST explanation of why there are so few top-level Oa. Because they have a short lifespan due to limited nutritional sources. b. Because they are efficient at gaining energy from lower trophic levels and do not need to over reproduce. Oc. Because extensive phyla were eradicated from a mass extinction following the Cambrian period O d. Only a small fraction of the energy is transferred from one trophic level to the next The greenhouse effect is caused primarily Select one O a. CFCs. b. sulfur oxides O c. CO2 O d. DDTExplanation / Answer
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1) d only a small fraction of the enrgy is transferred from one tropic level to the next
there is less available energy as you move up the tropic levels because of 2nd Law of Thermodynamics. As energy is transferred from one form to another, a large proportion of it is lost to the environment and is unusable.
2 c CO2
the greenhouse effect causes the heat of the sun to be held in the Earth’s atmosphere. CO2 is one the gases primarily responsible for the greenhouse effect.
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