Which of the following statements most accurately describes the inference that can be made regarding the possible functional significance of FoxP2 in the evolution of human language?
A. FoxP2 is a highly conserved transcription
fact that is a "language gene". Changes in
the function of this gene in the human lineage
were the key event that allowed language to
evolve.
B. FoxP2 is a developmental gene with
pleiotropic effects. Because this gene is
highly conserved among a group organisms
that are capable of acoustic communication it
must be involved in the evolution of human
language.
C. FoxP2 is a highly conserved transcription
factor. Because songbirds whose FoxP2 has
been knocked out are less capable of
learning new songs, this gene is likely
involved in the evolution of human language.
D. FoxP2 is a developmental gene that
affects acoustic communication in a range of
animal species. Because the human gene
shows an elevated rate of non-synonymous
to synonymous mutations in the human
lineage, changes to the function of this gene
in the humans may have contributed to the
evolution of language.
D
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Australia and Eurasia each have a mouse-like mammal, one a marsupial, the other a placental. These distantly related
species are an example of ____.
a. disjunct dispersal b. disjunct vicariance c. adaptive radiation d. convergent evolution e. distant migration
In this section of the tissue layers of a cnidarian, which item, A, B, C, or D, is a nematocyst?
1.A
2.B
3.C
4.D
RNA differs from DNA in many ways, including
A. DNA contains deoxyribose and RNA contains ribose. B. DNA contains thymine and RNA contains uracil instead of thymine. C. All are correct. D. DNA is double stranded and RNA is single stranded. E. RNA can catalyze some chemical reactions and DNA cannot.
In humans, variations in skin color are due to differences in the amount, type, and distribution of the pigment
____________________.Fill in the blank(s) with the appropriate word(s).