According to a variety of gene data, which hypothesis is correct?
A. the Multiregional Hypothesis
B. the Recently-Out-of-Africa Model
C. Both the choices are correct.
D. Neither choice is correct.
Answer: B
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Experimentally sending sustained stimulation to a muscle fiber causes ________
a. tetanus b. a period of insensitivity to further stimulation c. a twitch d. a forceful contraction
Consider the observations that a label on one head of a myosin V dimer moves in steps of 72 nm, but a label much nearer the myosin tail moves in steps of 36 nm
Discuss how these observations support a hand-over-hand mechanism rather than an inchworm mechanism of myosin V motility on an actin filament. What will be an ideal response?
Prosthetic groups in the class of proteins known as glycoproteins are composed of:
A) carbohydrates. B) flavin nucleotides. C) lipids. D) metals . E) phosphates.
What are the functions of the three proteins of the Ruv complex?
What will be an ideal response?