The ________ body cavity will contain the heart, lungs and spleen.
A. cranial
B. ventral
C. abdominal
D. dorsal
E. abdominopelvic
Answer: B
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Mutations that inhibit the function of photosystem I but not photosystem II would result in a plant cell that could still generate ______.
A. produce O2, ATP, and NADP+ B. produce ATP and NADP+ C. produce O2, ATP, and NADPH D. produce ATP and NADPH E. produce CO2 and ATP
Adenoviruses are a frequent cause of acute upper respiratory tract infections in humans. Adenoviruses are non-enveloped and their capsid contains a "fiber" protein that is analogous in function to the spike glycoproteins of HIV. Which of the following would be ACCURATE about an adenovirus that has a mutation in its fiber protein gene?
A. The virus would still cause upper respiratory tract infections in humans but at a slower rate. B. Because it has a defective fiber protein, it will now have a broader host range. C. It would not be able to cause disease in humans. D. It would be able to infect humans normally, but would not be able to replicate its genome. E. It would be able to infect humans normally, but would not be able to release new adenoviruses from the human cells.
A problem with the basic Oparin-Haldane model for the origin of life (though not necessarily an unsolvable one) is that ________
A) it does not explain the origin of chirality B) the early Earth is now not thought to have had a highly reducing atmosphere C) monomers have to be chemically activated before they will polymerize D) purine bases can attach to sugars in many equally probable ways E) All of the above.
The hydrogen atoms of a water molecule are bonded to the oxygen atom by ________ bonds, whereas neighboring water molecules are held together by ________ bonds
A) hydrogen; polar covalent B) polar covalent; hydrogen C) ionic; covalent D) polar covalent; ionic