Which statement about natural selection on early Earth is correct? a) Natural se
ID: 213879 • Letter: W
Question
Which statement about natural selection on early Earth is correct?
a) Natural selection could only act on populations of living organisms that had DNA as their genetic material.
b) Natural selection acted on populations of proto-cells on early Earth in order to make them more like modern living cells that have DNA as their genetic material.
c) Natural selection could act on a population of proto-cells on early Earth, selecting for those that were stable and had self-replicating, catalytic RNA that allowed them to grow and divide to produce similar daughter proto-cells.
Select the statement that describes an advantage of bilaterally symmetric animals over radially symmetric animals.
a) Coelom
b) Diploblastic development
c) Concentration of nerves to produce a true brain
d) Pharyngeal slits to allow for filter feeding
e) Choanocytes
Which of these diploblast is a true coelomate?
a) deuterostomes
b) annelids
c) cnidarians
d) This combination does not exist.
e) rhizarians
The prokaryotic organisms most likely to be found living in ponds near 100C are _____.
a) Korarchaeota
b) thermophiles
c) methanogens
d) halophiles
Explanation / Answer
Ans 1 : c) Natural selection could act on population of proto cells on early earth , selecting for those that were stable and self replicating , catalytic RNA that allowed them to grow and divide to produce similar daughter proto cells.
The natural selection selects the organism that has better survival probabilites , (survival of the fittest). The organisms which can survive better and replicate are chosen and the rest are filtered out of the population.
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