Download Viruses and Bacteria worksheet

Name
Date
Class
Viruses
Understanding Main Ideas
1. Viruses are considered to be nonliving. How are they similar to living organisms, and how are they
different?
2. How are viruses similar to parasites?
3. In the diagram to the right, what is the structure and function of the part
labeled “A”?
4. What is the structure and function of the part labeled “B”?
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.
5.
virus
6.
host
7.
parasite
8.
vaccine
a. an organism that lives on or in a host and causes it
harm
b. a substance introduced in the body to help produce
chemicals that destroy specific viruses
c. an organism that provides a source of energy for a
virus or another organism
d. a tiny, nonliving particle that enters and then
reproduces inside a living cell
45
Name
Date
Class
Bacteria
Understanding Main Ideas
1. How are bacterial cells different from the cells of eukaryotes?
2. List four ways that bacteria are helpful to people.
1. _______________________________________________
2. _______________________________________________
3. _______________________________________________
4. _______________________________________________
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