The significance of the Miller–Urey experiment is: that conditions on Earth 4 bi
ID: 72257 • Letter: T
Question
The significance of the Miller–Urey experiment is:
that conditions on Earth 4 billion years ago could produce RNA.
that it is possible to produce DNA under the same conditions as on Earth 4 billion years ago.
that conditions on Earth 4 billion years ago could produce amino acids.
that it is possible to produce LUCA in the laboratory.
What is not a reason that volvocine algae are ideal for studying the evolution of individuality?
The group exhibits extensive variation multicellularity.
They readily form aggregate slugs.
Within the group, there are multiple separate transitions to germ and soma lines.
They have had a recent transition to multicellularity.
a.that conditions on Earth 4 billion years ago could produce RNA.
b.that it is possible to produce DNA under the same conditions as on Earth 4 billion years ago.
c.that conditions on Earth 4 billion years ago could produce amino acids.
d.that it is possible to produce LUCA in the laboratory.
Explanation / Answer
1) Correct option is C
The Urey-Miller experiment fundamentally established that Earth's primitive atmosphere was capable of producing the building blocks (amino acids) of life from inorganic materials. All of the 20 amino acids were able to be produced using different sources of energy such as volcanic, solar, UV as well as electricity. This experiment was successful in providing the first real evidence for a theory of how life on Earth began.
In 1953, University of Chicago researchers Stanley L. Miller and Harold C. Urey set up an experimental investigation into the molecular origins of life. Their innovative experimental design consisted of the introduction of the molecules thought to exist in early Earth's primitive atmosphere into a closed chamber. Methane (CH4),hydrogen (H2), and ammonia (NH3) gases were introduced into a moist environment above a water-containing flask. To simulate primitive lightning discharges, Miller supplied the system with electrical current. After a few days, Miller observed that the flask contained organic compounds and that some of these compounds were the amino acids that serve as the essential building blocks of protein.
2) Correct Option is b
Formation of aggregate slugs is not the reason for using volvocine algae as an ideal model for studying the evolution of individuality
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