Why are liners laid down at the bottom of a landfill before waste is deposited in the landfill?
a.) to prevent bacteria from the soil entering and decomposing the trash
b.) to provide a system for capturing usable water from trash
c.) to prevent hazardous substances in the trash from leaking into the groundwater
d.) to provide a way to collect methane gas building up in the trash
if you could would be great. you ; ) : )

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

Be in this im starting a with you so if you want you can get a partner for this. but basically im going to assign you guys a biome and you have to have a big sheet paper and you will turn it into 4 squares. the top right square is will be a drawing square for a drawing you will make of your biome. the top left square is about the biomes plants and drawings of them. the bottom left square is about the biomes animals. the bottem rights square is about the description of the biome. leave a comment or an answer and i will assign biomes. if your request one thats the one you get. send me a link to the project and i will grade ! im not a teacher btw.

Which ocean is on the eastern coast of north and south america? arctic ocean indian ocean pacific ocean atlantic ocean