Biology 20

Lecture Quiz #1 – Introduction & Some Chemistry

Put your name and your lab day and time (T or Th) – this is your IQ test!

1.     A(n)                         has characteristics that result from the organization of its                        components .

a) population . . . . ecosystem;                    b) tissue . . . organs;     c) organism . . . organ system;

d) cell . . . tissues;                           e) molecule . . . cells.

2.     Which of the following represents the correct sequence of levels in life's hierarchy, proceeding downward from an individual animal?

a) brain, spinal cord, organ system, nerve cell, nervous tissue;

b) organ system, population of cells, nervous tissue;

c) organism, cardiovascular system, cardiac tissue, myocardial cell;

d) organism, intestinal cells, digestive system, pancreas;

3.     Which of the following statements characterizes a prokaryotic cell?

a) The presence of mitochondria.                             b) The lack of a membrane-enclosed nucleus.

c) The presence of a nucleus with no DNA.               d) Having a cell wall without a cell membrane.

4.     Which of the following is an example of a negative feedback system?

a) a bird’s unique structure makes flight possible;

b) mammals lowering blood glucose levels after a meal due to increased pancreatic secretions of insulin;

c) plants use light energy to convert water and CO2 to sugar and oxygen;

d) the transfer of the universal genetic code that is shared by all organisms.

5.     The atomic mass of an element represents the total number of:

a) protons;              b) neutrons;                  c) electrons;      d) protons + neutrons;   e) none of these

6.     One difference between 12C and 14C is that 14C has:

a) 2 more protons the 12C;               b) 2 more electrons than 12C;    

c) 2 more neutrons than 12C;            d) there is not such thing as 14C

7.     If you orally inhaled 100 mL of helium, then you will sound like Minnie Mouse. The statement above is an example of:

a) a hypothesis;      b) deductive reasoning;                         c) an observation;        

d) rationalization;     e) hum…good question.

8.     Which of the following is the prediction portion of the statement? (If you orally inhaled 100 mL of helium, then you will sound like Minnie Mouse)

a) you will sound like Minnie Mouse;             b) you orally inhaled 100 mL of helium;   c) Minnie Mouse inhaled helium.

9.     The ability of water molecules to form hydrogen bonds with other water molecules is critical to:

a) evaporative cooling of the skin surface;

b) the movement of water from the roots of a tree to its leaves;

c) the milder temperature of coastal regions when compared to inland areas;

d) the ability of certain insects to walk on the surface of water;

e) all of the above.

10.  In the equation, 2 H2 + O2 _ 2 H2O,

a) H2, O2 and H2O are all compounds;          b) H2, O2 and H2O are all element;          c) H2O is a compound;

d) H2 and O2 are molecules;                                     e) I think there’s more than one correct answer

11.  What is the role of a hypothesis in the scientific method?

a) it is the answer to a scientific question

b) it is the control variable in the experimental design

c) it is a question that can be tested experimentally

d) it is a possible explanation that can be tested experimentally