A part of an mRNA has the sequence AAA. Use the table below to figure out
which amino acid is coded for by AAA, then use the table to figure out which
change to this sequence would indicate a silent mutation.
Messenger
RNA Codons
UUA)
eu/UCA
AN
Second base in codon
U
UUU! BIJUCUJUAUUGU
UUC) Pne UCC UAC) Y JUGC) Cys
Ser
UAA Stop
UUG JUCG
UAG Stop UGO
CCU
CAU
CUC
CCC
) Pro
CUG ICCG
AUU) ACU
AUC ACC
AUA
|АСА
AUGSM ACG
GUU
GCU)
GCC
GCA
Ala
Leu CCA
First base in codon
Third base in codon
GUC
ರ ರರ
GCG
0
OB. AAG
O
C. AGA
O
D. AAC

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.