How is energy associated with food stored?a.potential energy in chemical formb.kinetic energy in chemical formc.potential energy in mechanical formd.kinetic energy in mechanical form
Why have forest fires in ponderosa pine forests become more damaging to that ecosystem than they were historically?a.Following a policy of fire suppression in these forests makes fires burn hotter.b.Fires in ponderosa pine forests are generally low-intensity fires.c.Following a policy of fire suppression in these forests clears out underbrush..d.Forest fires are a natural part of ponderosa pines forest ecosystems.
Historically, wildfires were viewed as detrimental to forest ecosystems.
Energy in most ecosystems must flow through autotrophs because ______.a.only autotrophs can convert solar energy into chemical energyb.autotrophs are simpler organisms than heterotrophsc.heterotrophs only generate a small fraction of their energy from photosynthesis.d.all of the above
The energy value listed for foods refers to the _______.a.total amount of chemical energy in the foodb.amount of energy available as fuel for the bodyc.total nutritional value of the foodd.amount of carbohydrates
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