One hypothesis for the origin of life proposes that RNA evolved prior to the appearance of the first living organism. According to this hypothesis, RNA served as the genetic storage molecule and directed the translation of proteins in the earliest living organisms. This hypothesis also suggests that DNA evolved from RNA late in the early history of life. Genetic studies have shown that distantly related species have different DNA replication machinery from one another, but they share similar protein translation machinery.

Does the hypothesis explain the results of these studies?

A. Yes, because if DNA evolved late in life's history, DNA replication machinery could have evolved separately in different lineages.
B. No, because if DNA evolved late in life's history, DNA replication machinery should have been present in the earliest living organisms.
C. No, because if RNA evolved early in life's history, protein translation machinery should have been present in the earliest living organisms.
D. Yes, because if RNA evolved early in life's history, protein translation machinery could have evolved separately in different lineages.

Is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance