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Scientist ____________________________ Class ___________________ Date __________________
USING KEY TERMS
Complete each of the following sentences by choosing the correct term from the
word bank.
cell
prokaryote
cell wall
function
organ
organelles
tissue
cell membrane
eukaryote
structure
1. A(n) ______________________ is the most basic unit of all living things.
2. The job that an organ does is the ______________________ of that organ.
3. Ribosomes and mitochondria are types of ______________________.
4. A(n) ______________________ is an organism whose cells have a nucleus.
5. A group of cells working together to perform a specific function is a(n)
______________________.
6. Only plant cells have a(n) ______________________.
UNDERSTANDING KEY IDEAS
Multiple Choice
_____ 7. Which of the following best describes an organ?
a. a group of cells that work together to perform a specific job
b. a group of tissues that belong to different systems
c. a group of tissues that work together to perform a specific job
d. a body structure, such as muscles or lungs
_____ 8. The benefits of being multicellular include
a. small size, long life, and cell specialization.
b. generalized cells, longer life, and ability to prey on small animals.
c. larger size, more enemies, and specialized cells.
d. longer life, larger size, and specialized cells.
_____ 9. In eukaryotic cells, which organelle contains the DNA?
a. nucleus
c. smooth ER
b. Golgi complex
d. vacuole
_____ 10. Which of the following statements is part of the cell theory?
a. All cells suddenly appear by themselves.
b. All cells come from other cells.
c. All organisms are multicellular.
d. All cells have identical parts.
.
Holt Science and Technology
Cell: The Basic Units of Life
Scientist ____________________________ Class ___________________ Date __________________
_____ 11. The surface area–to-volume ratio of a cell limits
a. the number of organelles that the cell has.
b. the size of the cell.
c. where the cell lives.
d. the types of nutrients that a cell needs.
_____ 12. Two types of organisms whose cells do not have a nucleus are
a. prokaryotes and eukaryotes.
b. plants and animals.
c. bacteria and archaea.
d. single-celled and multicellular organisms.
Complete each of the following sentences by choosing the correct term from the
word bank.
cellular respiration
photosynthesis
fermentation
13. Plants use ______________________ to make glucose.
14. During ______________________, oxygen is used to break down food
molecules releasing large amounts of energy.
For each pair of terms, explain how the meanings of the terms differ.
15. active transport and passive transport
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
16. cellular respiration and fermentation
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
UNDERSTANDING KEY IDEAS
Multiple Choice
_____ 17. The process in which particles move through a membrane from a
region of low concentration to a region of high concentration is
a. diffusion.
c. active transport.
b. passive transport.
d. fermentation.
.
Holt Science and Technology
Cell: The Basic Units of Life
Scientist ____________________________ Class ___________________ Date __________________
___ 18.Before the energy in food can be used by a cell, the energy must first be
transferred to molecules of
a. proteins.
c. DNA.
b. carbohydrates.
d. ATP.
Short Answer
19. Name the cell structures that are needed for photosynthesis and the cell
structures that are needed for cellular respiration.
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
20. Label the cell below:
.
Holt Science and Technology
Cell: The Basic Units of Life