The bulk of facebook's revenue comes from: advertising
Answer:
Today most people in developed countries have a scarcity of food sources.
Answer:
Ozone high in the atmosphere is a pollutant, but near Earth's surface, it provides protection from harmful rays.
Explanation:
I had this test last week so here you go, let me know if it helped!
If DNA read A-T-T-A-C-G-G-C-C the RNA would be U-A-A-U-G-C-C-G-G
DNA replication is important because new cells require their own strand of the DNA. Without replication, there would be no new organisms because the DNA’s information would not be passed on.
Maybe, not sure, may need to check yahoo answers for this one
