To Alexander Agassiz are attributed the following theories except:
a. colors of organisms were related to the absorption of different wavelengths of light at different depths.
b. that the Caribbean and Pacific Oceans were once connected.
c. that atolls form atop sinking mountains.
d. none of the above
C
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A source of gamma radiation is
A) plutonium and cesium isotopes. B) alpha and beta globin. C) uranium and radium. D) carbon-14 and strontium-70.
You modify the primary sequence of an enzyme in a region that will be the active site when the protein
is properly folded. What is the predicted outcome of this change?
a. The enzyme will not properly bind to the substrate. b. The enzyme will not be able to bind an allosteric inhibitor. c. The enzyme will have an increased rate of activity. d. There will be no change in the enzyme's function. e. The enzyme will bind the substrate but not be able to release the products.
The growth factor that stimulates fibroblasts to divide around a wound is released by
a. other fibroblasts. b. capillary endothelial cells. c. platelets. d. lymphocytes.
Helminthic diseases are usually transmitted to humans by
A) respiratory route. B) genitourinary route. C) gastrointestinal route. D) vectors. E) aerosols.