The ________ model assumes that evolution occurs in spurts, between which there are long periods of stasis with little evolutionary change.
What will be an ideal response?
punctuated equilibrium
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The movement of plates of the Earth's crust is
a. plate tectonics. b. plate dynamics. c. plate mechanics. d. plate kinetics. e. plate motility.
The vestibular canal contains __________, while the cochlear duct contains __________
a. endolymph; perilymph b. tympanic membrane; organ of Corti c. organ of Corti; endolymph d. perilymph; endolymph e. scala media; endolym
A newly identified bacterial pathogen has been shown to cause disease in humans, disrupting the production of some proteins by interfering with the function of the endoplasmic reticulum of liver cells. Under specific growth conditions, this bacterial strain secretes a protein that appears to be responsible for the pathology of the disease. This protein is composed of two polypeptide chains, one of which binds to a receptor on the surface of liver cells, stimulating the uptake of the protein by endocytosis. Once inside the cell, the other polypeptide component interferes with the activity of ribosomes bound to the endoplasmic reticulum. This bacterial protein will most likely be classified as a/an __________.
A) superantigen B) A-B toxin C) invasin D) membrane-disrupting toxin E) bacterial kinase
__________ is the process by which a single-stranded RNA is synthesized using DNA as the template
a. transcription b. reverse transcription c. replication d. transformation e. None of the above