Differences between the amino acid sequence of human cytochrome c and that of 5 other species are given in the choices below. Based on these data, humans are most closely related to
A) bullfrogs: 20 amino acid differences.
B) pigeons: 12 amino acid differences.
C) fruit flies: 24 amino acid differences.
D) yeast: 42 amino acid differences.
B) pigeons: 12 amino acid differences.
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The stop codons are translated codons; that is, they specify amino acids to be inserted into the last position of a growing polypeptide chain.
Answer the following statement true (T) or false (F)
Why are the number of proteins in the eukaryotic proteome so much greater than the number of eukaryotic genes?
What will be an ideal response?
What does the presence of a tail in early human embryos and other chordates suggest about all chordates?
A) Chordates may eventually develop a tail when fully mature. B) Chordate embryos have greater mutation rates than other organisms. C) Chordates develop in a very different manner compared to other life forms. D) Chordates were derived from a common ancestor with this developmental pathway.
In ________, the mouth develops at or near the blastopore.
A. gastrocoelomates B. triploblastics C. protostomes D. blastocoelomates E. deuterostomes