Origin Of Life Flashcards
Origin of life on earth
Earths early atmosphere contains little or no oxygen. It was principal he composed of carbon dioxide, water vapor and nitrogen, with lesser amounts of carbon monoxide, hydrogen sulfide and hydrogen
Dating earths history
Relative dating allows paleontologists to determine whether a fossil is older or younger than other fossils. Radiometric dating realize on a radioactive substance to decay into a stable substance
What is the definition of era?
Ends/starts With a major in extinction
2 hypothesis on how evolution takes place
Gradualism is organisms evolve through a process of slow and constant change
Punctuated equilibrium: organisms’s evolve very quickly and then stay the same for a large period of time. The change is because there is a mutation in a few essential genes
