Which of the following must consume other organisms to obtain energy?
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1 point
Phototrophs
Autotrophs
Chemotrophs
Heterotrophs
None of the above
What is different about a food chain compared to a food web?
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1 point
It shows trophic interactions
It is a linear reprensentation
Species can occupy more than one tropic level
The sun is the ultimate source of energy
In a food pyramid, how much available energy would the secondary consumers have if the producers have 50,000 kcal/m2/yr?
*
1 point
500,000 kcal/m2/yr
5,000 kcal/m2/yr
500 kcal/m2/yr
25,000 kcal/m2/yr