Which of the following was part of sudbury's restoration efforts?
a. treating lakes and soils with lime
b. treating lakes and soils with sulfur
c. treating lakes and soils with nickel
d. digging up topsoil to remove metals

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

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

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.