What is the ozone layer?
Athin layer in the lower atmosphere that protects Earth from ultraviolet rays
Bthin layer in the upper atmosphere that protects Earth from ultraviolet rays
Cthin layer in the upper atmosphere that protects Earth from supersonic rays
Dthin layer in the lower atmosphere that protects Earth from supersonic rays
What do all ecosystems have ?
Abiotic p21 only
Babiotic p21 only
Cproducers only
Dbiotic and abiotic p21
Athin layer in the lower atmosphere that protects Earth from ultraviolet rays
Bthin layer in the upper atmosphere that protects Earth from ultraviolet rays
Cthin layer in the upper atmosphere that protects Earth from supersonic rays
Dthin layer in the lower atmosphere that protects Earth from supersonic rays
Abiotic p21 only
Babiotic p21 only
Cproducers only
Dbiotic and abiotic p21