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Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Vocabulary Review
Match the words on the left with the statements on the right.
_____ 1. population
_____ 2. carrying capacity
_____ 3. predation
_____ 4. coevolution
_____ 5. parasitism
_____ 6. symbiosis
a. the largest population that an environment can
support at any given time
b. when one species evolves in response to
another species
c. two or more species living together in a close,
long-term relationship
d. one organism feeds on and usually lives on or
in another larger organism
e. a group of organisms of the same species that
live in the same area and interbreed
f. the act of one organism feeding on another
Match the words on the left with the statements on the right.
a. a relationship in which both participating
species benefit
8. commensalism
b. the entire range of conditions an organism is
potentially able to occupy
9. niche
c. the role of a species in an ecosystem
d. the elimination of a competing species
10. fundamental niche
e. the part of its fundamental niche that a
11. realized niche
species occupies
f. a relationship in which one species benefits
12. competitive exclusion
and the other is neither harmed nor helped
_____ 7. mutualism
_____
_____
_____
_____
_____
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
10
Populations and Communities
Name ______________________________ Class ___________________ Date __________________
Vocabulary Review continued
In the space provided, write the letter of the term that best completes each
statement.
_____ 13. The largest ecological niche where an organism or species can possibly
survive is its
a. habitat.
b. fundamental niche.
c. community.
_____ 14. A relationship between two species in which both species benefit is called
a. predation.
b. parasitic.
c. mutualism.
_____ 15. A single species in an ecosystem that affects the survival of many other
species is called a
a. parasite species. b. keystone species.
c. predator.
Using the word bank below, fill in each blank provided.
carrying capacity
parasitism
realized niche
competitive exclusion
predation
symbiosis
16. When a shark eats a seal, ______________________ is taking place.
17. Mutualism and commensalism are two types of ______________________.
18. In the face of competition, an organism may occupy only part of its
fundamental niche. That part is called its ______________________
______________________.
19. A characteristic of ______________________ is that these organisms often do
not kill their prey because they depend on the prey for food and place to live.
20. The maximum population number that the environment can support at one
time is called ______________________.
21. The principle of ______________________ states that when two species are
competing, the one that competes better will eliminate the other species.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
11
Populations and Communities