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Name _________________________ Date ___________________ Class ____________
Populations and Communities
Guided Reading and Study
Adapting to the Environment
Match the term with its definition.
1. natural selection
a. characteristic that allows a species to live
successfully in its environment
2. adaptation
b. the way a species makes its living
3. niche
c. process in which a species becomes better
suited to its environment.
4. Is the following sentence true or false? The struggle between
organisms to survive in a habitat with limited resources is called
natural selection.
5. Is the following sentence true or false? Specializing can reduce
6. An interaction in which one organism kills and eats another is called
The organism that does the killing is the
The organism that is killed is the
7. Is the following sentence true or false? If a prey population decreases,
the population of its predator probably will decrease as well.
8. Complete the compare/contrast table.
Types of Symbiotic Relationships
Type of Relationship
How Species Are Affected
One species benefits; the other species is unharmed.
One species benefits; the other species is harmed.
In a parasitic relationship, the organism that benefits is called a(n)
and the organism it lives on or in is called a(n)