Chapter 2 Lesson 2

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Name
Date
Class
Bacteria
On a separate sheet of paper, explain how bacteria can help people as well as how they
can harm people.
55D
Name
Date
Class
Bacteria
Understanding Main Ideas
Answer the following questions on a separate sheet of paper.
1. How are bacterial cells different from the cells of eukaryotes?
2. List four ways that bacteria are helpful to people.
Building Vocabulary
Match each term with its definition by writing the letter of the correct definition in the
right column on the line beside the term in the left column.
3.
bacteria
a. tiny structures that produce proteins inside bacteria
4.
cytoplasm
b. a process by which bacteria reproduce asexually
5.
ribosomes
c. organisms that break down large, complex chemicals
in dead organisms into small, simple chemicals
6.
flagellum
d. the region inside the cell membrane of a bacterium
7.
cellular respiration
8.
binary fission
9.
conjugation
e. a process by which bacteria reproduce sexually
f. the process of breaking down food to release energy
10.
endospore
g. tiny single-celled organisms that live almost
everywhere
h. a method of slowing down food spoilage
11.
pasteurization
i. a small, rounded, thick-walled resting cell inside a
bacterial cell
12.
decomposers
j. a whip-like structure that helps a bacterial cell to
move
55E
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