Which of the following is true of water?
a. The oxygen end is slightly electropositive.
b. Hydrogen bonds hold water molecules together.
c. Water covers about one-half of the earth’s
surface.
d. It participates in hydrophobic interactions with
polar molecules.
e. Its solvent properties are greatest with nonpolar
molecules.
Answer: b
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Which of the following statements regarding the future of populations in developing countries are correct?
I) The fecundity is predicted to increase. II) Survivorship will increase. III) Overall population size will increase dramatically. IV) The number of offspring each year is predicted to remain high. A) only I and III B) only II and IV C) only I, II, and IV D) only II, III, and IV E) only I, II, and III
Which of the following are true regarding redox reactions? There may be more than one correct answer
A. Oxidizing agents accept electrons. B. If a molecule accepts electrons, it has been reduced. C. Redox reactions may involve the transfer of hydrogen ions (H+). D. A molecule that has gained H atoms is said to be reduced. E. Reducing agents accept H atoms. F. Oxidizing agents accept H+ ions.
Dominance is the converse or opposite of diversity
Indicate whether the statement is true or false
Blood containing metabolic waste is transported to the kidneys by the renal vein; the renal artery removes blood from the kidneys once the waste has been removed
Indicate whether the statement is true or false