Ch. 1.1 The cell is the basic unit of a living thing.

Vocabulary Words: cell, genetic material, organism, theory, unicellular, multicellular, microscope, bacteria

Review 1.1
1. organization, growth and development, response to environment, reproduction

2. It allowed people to see cells. Before the microscope humans did not realize that life could be so small.

3. Every living thing is made of one or more cells; cells carry out the functions needed to support life; cells come only from other living cells.

4. The cell theory is widely accepted and explains observations of nature, and is supported by evidence such as Pasteur´s experiments.

5. multicellular: many cells, complex, easier to see; unicellular: one cell, cannot be seen directly; both: need energy, materials, and living space

6. In Pasteur´s experiment, bacteria did not grow spontaneously. They came from the environment, which indicates that cells come from other cells.