1 H2SO4 + 2 NaNO2 ---> 2 HNO2 + 1 Na2SO4
1. B: AA or aa (homo means "the same," these are identical traits.)
2. B (hetero means "different", and these are different types of traits."
Skin cells are also called epithelial cells
Answer: 30 years
Explanation: what is 30 plus 30... 60 it says he died in 1930 and discoverd the thing in 1960 add 30 boom its been 30 years