Biology, 06.11.2021 07:10 ckfuentes6272
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.
Answers: 2
Biology, 22.06.2019 09:30
What is the difference between a scientific hypotheses and a scientific theory?
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Biology, 22.06.2019 09:40
For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes
Answers: 1
One hypothesis for the origin of life proposes that RNA evolved prior to the appearance of the first...
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