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.
A) plutonium and cesium isotopes.
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Which of the following stages in the breakdown of the piece of toast you had for breakfast generates the most ATP?
(a) the digestion of starch to glucose (b) glycolysis (c) the citric acid cycle (d) oxidative phosphorylation
Why did industrial melanism in the peppered moth, Biston betularia, help convince researchers that the intensity of natural selection can be very strong?
A. The dark-colored allele increased in frequency very rapidly in multiple populations and later decreased rapidly after the environment changed. B. The dark-colored morph drove the light-colored morph to extinction. C. Birds were unable to prey on the moths once they acquired their color adaptations. D. The moth population exploded, covering England with moths during the Industrial Revolution. E. Natural selection maintained constant proportions of the color alleles in the population, despite rapid environmental change brought about by the Industrial Revolution.
How do oxygen molecules travel through a cell membrane?
A) diffusion B) active transport C) carrier proteins D) endocytosis
Diseases that are induced by modern medical procedures are referred to as ________ infections
A) iatrogenic B) exogenous C) opportunistic D) endogenous E) subacute