By the ______________ theory, water is pulled upward through a plant by air's drying power, which creates continuous negative pressure.
A. transpiration
B. cohesion-tension
C. pressure flow
D. adaptive
E. water-conservation
Answer: B
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Protein A, commonly used in immunoblots, is derived from
A) Staphylococcus. B) Escherichia. C) Bacillus. D) Clostridium.
With the advent of tools to incorporate molecular data, phylogenetic analysis can be used to:
A. reconstruct the evolutionary history of a group of organisms over millions of years. B. track the spread of a pathogen, such as a fungus or virus, from place to place. C. identify the origin of invasive pest species. D. track shipments of endangered species or their products (such as elephant ivory or bushmeat). E. All of the answer options are correct.
Adaptive immunity refers to the type of specific immunity that
A. develops after exposure to antigen. B. can be induced by natural or artificial means. C. can result from transfer of antibodies from one individual to another. D. All of the choices are correct.
How many molecules of ATP are needed to reduce one molecule of carbon dioxide to carbohydrate by oxygenic phototrophs during the dark reactions of photosynthesis?
A. 3 B. 2 C. 10-12 D. 4