You are working in a lab studying a gene and notice that there are many other genes that code for similar traits. This is most likely the result of:
A. duplication and divergence.
B. reciprocal translocation.
C. inversion.
D. deletion.
E. translocation.
A
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Parasites impact host populations by
a. draining nutrients from hosts. b. making hosts more vulnerable to predation. c. lowering birth rates and raising death rates. d. causing sterility e. all of these.
Ribbed mussels (Modiolus demissus), fiddler crabs (Uca spp.), and marsh periwinkles (Littorina spp.) are the dominant animals of a high salt marsh
Indicate whether the statement is true or false
The species at the top of a food web
A) do not prey on other species and are not subject to predation. B) do not prey on other species and are subject to predation. C) prey on other species and are not subject to predation. D) prey on other species and are subject to predation.
The tRNA shown in the figure has its 3' end projecting beyond its 5' end. What will occur at this 3' end?
A. The excess nucleotides (ACCA) will be cleaved off at the ribosome. B. The small and large subunits of the ribosome will attach to it. C. The 5' cap of the mRNA will become covalently bound. D. The amino acid binds covalently. E. The codon and anticodon complement one another.