8-The _________ form the surface of an atom and participate informing covalent bonds.

a. neutrons and electrons

b. protons

c. neutrons

d. protons and neutrons

e. electrons

10-Failure of cell cycle check points can cause ________.

a. Increased chance of cancer

b. Increased mutation rates

c. Benign tumors

d. All of these

e. Unregulated cell division

11-Which is the lowest level of biological organization thatshows the emergent property we consider “life”?

a. Population

b. Cell

c. Community

d. Molecule

e. Organism

14-Why are sweating and other body-cooling mechanisms necessaryduring vigorous exercise?

a. A byproduct of respiration is heat

b. About twice as much energy is released as heat than is madeinto ATP units

c. The human body overheats at about 100 degreesFarenheight.

d. So much heat is released by cellular respiration duringexercise that the body is in danger of overheating.

e. Muscle movement causes friction

17-A measurement included in the outcome of an experiment iscalled an ________.

a. independent variable

b. Control

c. dependent Variable

d. Hypothesis

e. Experiment

21Dissolving NaOH in neutral water causes a dramatic change inpH because of __________.

a. the increase in OH- concentration

b. the decrease in OH- concentration

c. the increase in H+ concentration

d. the increase in Na+ concentration

23-What type of junction is associated with attaching adjacentcells to form tissues?

a. Gap junction

b. Petticoat junction

c. Anchoring junction

d. Tight junction

24-The genetic material is made of ___________.

a. carbohydrate

b. protein

c. lipid

d. nucleic acid