Because oxygen is more electronegative than hydrogen, the water molecule is:

A. hydrophobic.
B. hydrophilic.
C. nonpolar.
D. ionic.
E. polar.


E. polar.

Biology & Microbiology

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Hydrogen, atomic number 1, has 3 isotopes, 1H, 2H, 3H. 1H is comprised of one proton, one neutron and one electron

Indicate whether the statement is true or false.

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Dogs have a diploid chromosome number of 78 . How many chromosomes do their gametes have?

a. 39 b. 78 c. 156 d. 234

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The olfactory epithelium is located in the roof of the mouth

____________________ Indicate whether the statement is true or false.

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What percentage of species listed under the U.S. Endangered Species Act are threatened because of competition, predation, parasitism, and herbivory by introduced species?

A) 5% B) 10% C) 20% D) 40% E) 100%

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