1 elimination of water by a contractile vacuole
2 transport of oxygen through the cell membrane
3 ingestion of nutrients
4 process of binary fission

2 Which term is defined as all the chemical reactions that are required 
to sustain life ,

1 metabolism         3 nutrition
2 regulation           4 synthesis

3 A classification scheme is shown below.

This classification scheme indicates that the house cat is most closely 
related to the

1 dolphin          3 lynx
2 songbird        4 wolf

4 A structure that performs a specialized function within a cell is known
as

1 a tissue          3 an organ
2 an organelle   4 a system

5 Which organism is considered in exception to the cell theory because it 
has a noncellular structure?

1 alga               3 virus
2 bacterium      4 moss

6 Which chemical compound makes up the greatest percentage of a
protozoan?

1 nucleic acid    3 fatty acid
2 glucose          4 water

7 Which factor does not alter the rate of hydrolysis of maltose?

1 temperature of the environment of the reaction
2 pH of the environment of the reaction
3. size of the substrate molecule
4. number of enzyme molecules present