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Primavera Biology B Unit 4. Evolution Questions and Answers Fully Solved
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Primavera Biology B Unit 4. Evolution
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Primavera Biology B Unit 4. EvolutionCHECKPOINT 17 - answer
What gas present in today's atmosphere was largely absent from early Earth's
atmosphere? - answer oxygen
What are some possible sources for early organic molecules?
Select all that apply. - answer existing inorganic molecules forming into more complex
organic ones by using energy from lightning
simple inorganic compounds arriving on Earth through meteorites or other objects
Which option correctly replaces X and Y?
The Miller-Urey experiment resulted in the formation of several X molecules that are the
basis for Y. – answer X: amino acid
Y: proteins
Study the experiment illustrated by the following image:
https://assets.learnosity.com/organisations/625/asset/media/1170676
What aspect of early Earth was the spark meant to recreate? - answerlightning
What were the products of experiments that were similar to the one Miller and Urey
conducted? - answerorganic compounds
Which two organelles are thought to have arisen from prokaryotes that became
engulfed by other cells according to the theory of endosymbiosis? - answermitochondria
and chloroplasts
What does the RNA world hypothesis state about ribozymes? - answerRibozymes were
once more common than they are now. They eventually got replaced by proteins.
What functions are central to RNA in the RNA world hypothesis?
Select all that apply. - answerRNA can serve as a genetic code.
RNA strands can act as enzymes.
What are RNA molecules that can act as enzymes? - answerribozymes
CHECKPOINT 18 - answer
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