BIOL 101 The Biology of Change Through Time Quiz- Liberty/BIOL 101 The Biology of Change Through Time Quiz- Liberty
The Design theorist comes to the
... [Show More] conclusion that most mutations occurring today are
harmful because
there are fewer kinds of organisms on the planet today than ever before.
changes to base sequence in DNA will uniformly stop the transcription process.
no such thing as a helpful mutation has ever been observed.
natural selection can favor only one gene at a time.
they are deteriorative changes made to something that was elegantly designed.
IncorrectQuestion 2
0 / 3.2 pts
One important value that disruptive selection can have to a natural population is that it
can eliminate rare individuals whose sexuality is intermediate between male and
female.
will remove from the population all individuals whose behavioral traits vary greatly from
the populational norms.
collect and save those individuals whose phenotypes are most like the standard
phenotype of the species.
quickly locates and preserves those individuals best adapted to defending the rest of
the population from predators.
can act positively on a population in which an abnormally high number of harmful
mutations is occurring.
Question 3
3.2 / 3.2 pts
One problem associated with evolving a system in which RNA bases code for amino
acids is that
amino acids are basic and RNA nucleotides are acidic in chemical nature.
the correct bonding of amino acids to tRNAs requires protein catalysis—we need
mature proteins to begin making the first proteins.
the amino acids would then have to become building blocks of proteins instead of DNA.
the system would always be confusing DNA molecules with RNA molecules in setting up
and operating the initial coding process.
ribosomes will prefer DNA over RNA in the formation of peptide bonds.
Question 4
3.2 / 3.2 pts
The sentence, “O you, who look on this our machine, do not be sad that with others you
are fated to die, but rejoice that our Creator has endowed us with such an excellent
instrument as the intellect” was first spoken by
Leonardo da Vinci
Charles Darwin
Verrocchio
John Henslow
Thomas Malthus
Question 5
3.2 / 3.2 pts
Which of the following could be a new mutation needed to generate appropriate
structures for flight feathers? a mutation that:
matches barbule length to the space between feather barbs
creates length variety among coracoids so that they are appropriately hidden
shortens the length of the humerus bone
shortens barbules so that they don’t interfere with air flow patterns
decreases the number and size of feather placodes.
Question 6
3.2 / 3.2 pts
Mycoplasma genitalium is well known for the _________ infections it causes.
genital tract
spleen
brain
liver
wide variety of organ
Question 7
3.2 / 3.2 pts
Natural selection is limited in its effectiveness in preserving new favorable mutations in
an environment that
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