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 ; ) : )

When analyzing tree rings, what do scientists assume a thin ring indicates?

The accompanying figure shows the percent of selected dna sequences that match between a chimpanzee and other primates. these data support the hypothesis that the figure shows the percentage of selected d n a sequences that match between the chimpanzee and other primates. the human has an almost 98 percent match, the gorilla has an almost 97 percent match, the orangutan has a 96 percent match, the gibbon has an almost 95 percent match, and the old world monkey has an almost 92 percent match. the accompanying figure shows the percent of selected dna sequences that match between a chimpanzee and other primates. these data support the hypothesis that the figure shows the percentage of selected d n a sequences that match between the chimpanzee and other primates. the human has an almost 98 percent match, the gorilla has an almost 97 percent match, the orangutan has a 96 percent match, the gibbon has an almost 95 percent match, and the old world monkey has an almost 92 percent match. chimpanzees and gibbons are the most closely related the chimpanzee's closest surviving relative is humans orangutans are the primates least closely related to chimpanzees old world monkeys and gibbons are the most closely related

Which of the following is a common response to cell signaling?