Name: 
 

7th Grade Cell Theory



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Phylogeny tells ______.
a.
how an organism is different from other organisms
b.
how an organism has changed over time
c.
how an organism received its two-part scientific name
d.
how Linnaeus started binomial nomenclature
 

 2. 

The smallest group in the classification system used today is called a ______.
a.
family
c.
kingdom
b.
genus
d.
species
 

 3. 

Linnaeus developed a system of grouping organisms that was accepted by most scientists. He grouped organisms with ______ together.
a.
dichotomous keys
c.
similar fossils
b.
similar structures
d.
similar hereditary information
 

 4. 

Organisms that can mate and produce fertile offspring belong to the same ______.
a.
species
c.
kingdom
b.
genus
d.
domain
 

 5. 

All of these are characteristic of living things EXCEPT ______.
a.
homeostasis
c.
reproduction
b.
movement
d.
responds to stimuli
 

 6. 

Rough endoplasmic reticulum has ______ attached to it.
a.
ribosomes
c.
chloroplasts
b.
Golgi bodies
d.
lysosomes
 

 7. 

All of these are ways to prevent viral infections EXCEPT ______.
a.
vaccines
b.
good sanitary conditions
c.
antibiotics
d.
controlling animals that spread the disease
 

 8. 

When you receive a vaccine, your body produces ______ to help fight the infection.
a.
weakened viruses
c.
Golgi bodies
b.
interferons
d.
antibiotics
 

 9. 

When an organism regulates its internal environment it is ______.
a.
growing into an adult organism
b.
reproducing
c.
responding to its external environment
d.
maintaining homeostasis
 

 10. 

A group of cells that work together to do one job is called a(n) ______.
a.
organ system
c.
tissue
b.
one-celled organism
d.
organ
 

 11. 

Your heart is an example of a(n) ______.
a.
tissue
c.
cell
b.
organ
d.
organ system
 

 12. 

Latent viruses do all of these EXCEPT ______.
a.
destroy the host cell immediately
b.
make copies of their hereditary material as the host cell reproduces
c.
enter a host cell by means of its cell membrane
d.
insert their hereditary material into the hereditary material of its host cell
 

Matching
 
 
Match the each term with its description below
a.
cell wall
g.
organism
b.
mitochondrion
h.
endoplasmic reticulum
c.
host cell
i.
chloroplast
d.
ribosome
j.
cytoplasm
e.
cell membrane
k.
nucleus
f.
active virus
l.
Golgi body
 

 13. 

directs all cellular activities
 

 14. 

makes proteins
 

 15. 

protects a cell and gives it its shape
 

 16. 

uses light energy to make a sugar
 

 17. 

where energy is released when food is broken down into carbon dioxide and water
 

 18. 

sorts and packages materials and moves them out of the cell
 

 19. 

process materials and move them around inside the cell
 

 20. 

regulates interactions between the cell and its environment
 

 21. 

makes copies of viral DNA
 

 22. 

causes the host to produce new viruses like itself
 

 23. 

needs a place to live, a food source, and water
 

 24. 

constantly flows inside the cell
 
 
Match each characteristic of life with the corresponding observation below. Some items may be used more than once.
a.
Living things grow and develop.
d.
Living things use energy.
b.
Living things respond.
e.
Living things are organized.
c.
Living things maintain homeostasis.
f.
Living things reproduce.
 

 25. 

The fish in the classroom aquarium have baby fish.
 

 26. 

Your neighbor’s puppy has grown into a large dog.
 

 27. 

Under a microscope, a piece of onion looks like it is made up of many boxes.
 

 28. 

Your friend has two brothers and a sister.
 

 29. 

You get bumpy skin and shiver when you are cold.
 

 30. 

All living things are made of cells.
 

 31. 

After being in the dark, it takes a moment for your eyes to adjust to a bright light.
 

 32. 

Without sunlight, a plant will eventually die.
 

Short Answer
 

 33. 

What do living things need to survive?
 

 34. 

What is binomial nomenclature?
 

 35. 

List four characteristics that all living things share.
 

 36. 

Compare and contrast prokaryotic cells and eukaryotic cells.
 

 37. 

Compare and contrast plant and animal cells.
 

 38. 

Compare and contrast one-celled and many-celled organisms.
 

 39. 

Compare and contrast a latent virus with an active virus.
 

Essay
 

 40. 

What invention led to the cell theory? List the three parts of the cell theory.
 

 41. 

Explain three reasons scientific names are useful.
 



 
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