Oswald Avery's work with two strains of bacteria, one of which caused the
other to become harmful, showed that:
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A. the factor that transforms cells is a protein.
O
B. DNA carries the instructions for making proteins.
O
O
C. two alleles interact to produce a trait
D. DNA is the factor that transforms cells

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

i think this picture will you.

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.