6. What is one main human activity that causes smog, acid rain, and con- tributes to global warming?

What does gradualism and punctuated equilibrium have in common

Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells

Explain how organisms could be harmed by high levels of salt from roadways?