Water flowing over fish gills exchanges gases with blood flowing in the opposite direction inside gill capillaries. This is called __________.
Fill in the blank(s) with the appropriate word(s).
countercurrent exchange
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An American nurse returning from serving in a hospital in the Congo experienced chills, fever, and sweats. The fever cycle peaked about every 48 hours. Which of the following is a likely diagnosis?
A. African sleeping sickness B. Malaria C. Leishmaniasis D. Histoplasmosis
In what ways are hydrogen bonds and ionic bonds similar?
A) Both are based on attraction between atoms that carry differences in electrical charge. B) Both are based on attraction between two atoms that carry negative charges. C) Both are based on repulsion between atoms that carry differences in electrical charge. D) Both involve an even sharing of electrons between atoms. E) Both are based on attraction between two atoms that carry positive charges.
________ is an electron carrier similar to NADH.
Fill in the blank(s) with the appropriate word(s).
The portion of the DNA molecule that is translated is composed of ______________.
A. introns B. anticodons C. exons D. transcriptions E. exons and transcriptions