A)ecosystem stability.
B)species interactions in various types of ecosystems.
C)the synthesis of nutrients within ecosystems.
D)patterns of species diversity within ecosystems.
E)movement of energy and materials through ecosystems.

A)the movement of chemicals through ecosystems.
B)just those nutrients that are limiting for organisms.
C)the nutrients used solely by primary producers
D)all chemical elements plus light energy.
E)None of these choices are correct.

A)The carbon fixed during photosynthesis.
B)The carbon fixed after cellular respiration is accounted for.
C)Energy released by primary consumers.
D)Photosynthetic production plus energy recycled by detritivores.