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Chapter 55 Mastering Biology Questions and Answers Solved
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Chapter 55 Mastering Biology
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Chapter 55 Mastering BiologyOn a global scale, energy _____ ecosystems whereas chemical elements _____
ecosystems. - answer flows through ... are recycled in
Consider this segment of a food web: Snails and grasshoppers eat pepper plants;
spiders eat grasshoppers; shrews eat snails and spiders; owls eat shrews. The shrew
occupies the trophic level(s) of _____. - answer secondary and tertiary consumers
The producers in aquatic ecosystems include organisms in which of the following
groups? - answer All of the above are correct
The relationship between biomass and primary productivity is that _____. - answer
primary productivity is the rate at which biomass is produced
If NEP is greater than zero then... - answer the forest is a carbon sin
If NEP is less than zero then... - answer the forest is a carbon source
NEP = GPP - RT where RT = - answer Ra + Rh
NEP = GPP - (Rh + Ra) where GPP = - answer NPP + Ra
NEP = ( _____+ Ra) - (Rh + ______) – answer NPP, Ra
NEP = _____ -Rh – answer NPP
Based on these data alone, identify the most appropriate statement about the impact
mountain pine beetle outbreaks may have on climate regulation. - answer These data
demonstrate that mountain pine beetle outbreaks can convert forest ecosystems from
carbon sinks to carbon sources. A forest that is a carbon source releases more CO2 to
the atmosphere than it absorbs, contributing to higher atmospheric CO2 concentrations
and an enhanced greenhouse gas effect.
Food web - answer Detritus - rotting log, dead animal
Primary producer - living maple leaves
primary consumer or decomposer - fungus, cricket, maggots
Secondary consumer - earthworm, millipede
Tertiary and secondary - alligator lizard, robin
Calculate the trophic efficiency from each trophic level to the next for the pyramid of
productivity (biomass pyramid) shown below. - answer14.9%, 10.6%, 12.0%
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