The surface area of a cube increases how in relation to its length (l)?
A) l
B) l2
C) l3
D) 6l2
D
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DNA associates very tightly with nucleosomes because
A. DNA can form covalent bonds with histone proteins. B. negative charges on DNA are attracted to positive charges of the histone proteins. C. the histone tails wrap tightly around the DNA double helix. D. the amino acids of histone proteins are largely acidic, while DNA molecules are basic. E. histone H1 tightens the coils of DNA that are wrapped around the nucleosome.
The Hubbard Brook Watershed Project illustrated that
a. deforestation can alleviate drought conditions. b. deforestation can result in polluted streams. c. deforestation results in calcium retention in soil. d. primary consumers are the most important part of that energy pyramid. e. trees absorb too much water and are not useful in a watershed area.
Sugars are formed in the chloroplasts ____
a. on the outer membrane b. on the inner membrane c. in the thylakoid compartment d. in the stroma e. within the thylakoid membrane
Which of the following can be inferred from the presence of coliforms in water?
a. fecal contamination b. poor water quality c. presence of toxins d. both fecal contamination and poor water quality