Some scientists have proposed that the earliest forms of life may have existed in an "rna world" where rna was both the genetic material and responsible for enzymatic activity. imagine that you have recreated such a life form. what would demonstrate that rna, but not protein or dna, is necessary and sufficient for these functions?

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

but there is no

i guess you forgot putting it.

the correct option is option d

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!