Gross Primary Productivity Refers to the Total

Multiple Choice

Gross primary productivity refers to the total

A) quantity of solar energy available to the ecosystem in a given period of time.
B) quantity of solar energy reaching a given area of the ecosystem.
C) energy trapped initially by the producers.
D) energy used by the heterotrophs of the ecosystem in a given period of time.
E) energy used by the producers for their growth and reproduction.