North Carolina Science Grade 7

Chapter 3: Cells—The Units of Life

Cells - The Units of Life

1.
What object did Robert Hooke first observe cells in?
A)a cork
B)a bacterium
C)a leaf
D)a muscle
2.
If a microscope has a lens with a power of 20X, how many times will it magnify something?
A)20 times is actual size
B)2 times its actual size
C)2,000 times its actual size
D)200 times its actual size
3.
Groups of similar cells that all do the same sort of work are called __________.
A)cell systems
B)organs
C)organ systems
D)tissues
4.
Which of the following is NOT an organ?
A)skin
B)the heart
C)bones
D)blood tissue
5.
The statement that all cells come from cells that already exist is part of __________.
A)the fossil record
B)the reproductive theory
C)the cell theory
D)Hooke's theory
6.
Blood is considered a(n) __________.
A)organ
B)organ system
C)cell
D)tissue
7.
Put the level of organization in order from smallest to largest.
A)cells, organs, tissues, and organ systems
B)organs, tissues, cells, and organ system
C)organ system, organs, tissues, and cells
D)cells, tissues, organs, and organ systems
8.
Which of the following are the smallest organisms on Earth?
A)mold
B)bacteria
C)algae
D)shrimp
9.
Which type of cell forms a protective layer for your body?
A)nerve cell
B)muscle cell
C)skin cell
D)fat cell
10.
What is the smallest unit of life in all living things called?
A)a cell
B)bacteria
C)an atom
D)a molecule
11.
Which of the following does NOT have organelles?
A)plants
B)fungi
C)bacteria
D)algae
12.
Which of these is similar in function to a vacuole?
A)a closet
B)a bakery manager
C)an electric circuit
D)a wall
13.
What determines which traits an organism will have?
A)the nucleus
B)cytoplasm
C)DNA
D)the mitochondrion
14.
If a group of organs work together to perform a specific job, what are they called?
A)an organism
B)tissue systems
C)an organ system
D)helper organs
15.
Cytoplasm is made mostly of _________.
A)vitamins
B)gelatin
C)chemicals
D)water
16.
Which two structures do plant cells have that animal cells do not have?
A)vacuoles and chloroplasts
B)chloroplasts and a cell wall
C)cell membrane and a nucleus
D)chromosomes and chlorophyll
17.
Plants, algae, and many bacteria make their own food through the process of __________.
A)digestion
B)photosynthesis
C)metabolism
D)cellular respiration
18.
What part of the cell helps control what enters and leaves the cell?
A)cytoplasm
B)nucleus
C)cell membrane
D)mitochondrion
19.
Which of the following is an organ?
A)stomach
B)blood tissue
C)nerve tissue
D)muscle tissue
20.
Chloroplasts capture energy from the __________ to make food.
A)soil
B)stored sugar
C)Sun
D)Moon
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.