Answer:
There are many methods used by the scientists to study the change of earth's atmosphere and climate over the past million years. The study is called paleoclimatology. Since there are no measurement tools during those era, it studies the past by using proxy data. Proxy data includes earth's sediments, tree rings, historical archives, ice cores, and etc.
Explanation:
Answer:1.Oswald Avery. C.M.Maclead, and M.McCarty in 1944. 2.D.Watson and Francis H.C.Crick 3.Friedrich Miescher 4.Charles Yanofsky 5.Oswald Avery, Colin MacLeod and Macclyn McCarty 6.Erwin Chargaff.
Explanation:
First one, disease causing microorganisms
Answer: the ecosystem is balanced.
Explanation: