Which of the following statements best represents an example of biological interdependency?
A. Energy from the sun drives photosynthesis.
B. All organisms are composed of cells
C. Cows derive energy from the plants they eat.
D. Plants can adapt to their environment.
E. Materials continually cross into and out of cells through the cell membrane.
Which of the following is an example of metabolism? An organism that can
A. assimilate and use energy.
B. respond to the environment.
C. maintain a relatively constant internal environment.
D. evolve to adapt to a changing environment.
E. reproduce.
Which of the following is/are found in the nucleus of an atom?
A. protons
B. neutrons
C. electrons
D. both A & B
E. all of the above
An atom of Neon (Ne) has how many electrons?
A. 1
B. 2
C. 6
D. 8
E. 10
How many valence (outer shell) electrons does a positively-charged ion of sodium (Na+) have?
A. 1
B. 2
C. 7
D. 8
E. 11
The lower the pH,
A. the more acidic the solution is.
B. the lower is the actual pH number.
C. the greater is the hydrogen ion concentration.
D. All of the above are true.
What primarily determines the cohesiveness of water molecules?
A. hydrophobic interactions
B. nonpolar covalent bonds
C. ionic bonds
D. hydrogen bonds
E. both A and C
A given solution contains a concentration of 0.001 (10-3) moles of hydrogen ions [H+] per liter. Which of the
following best describes this solution?
A. strongly acidic
B. strongly basic
C. weakly acidic
D. weakly basic
