CH 11 and 12 Vocabulary

Name

Chapter 11 and 12 Vocabulary

Term

Picture/symbol/word

Definition

 

Adaptation

 

 

 

An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment

 

Aggression

 

 

 

A threatening behavior that one animal uses to gain control over another animal

 

Birth Rate

 

 

 

The number of births per 1000 individuals for a certain time period

 

Carrying capacity

 

 

The largest population that a particular environment can support

 

Circadian behavior/rhythm

 

 

A behavior cycle that occurs over a period of about one day

 

Competition

 

 

 

The struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time

 

Courtship behavior

 

 

The behavior in which males and females of the same species engage to prepare for mating

 

Death rate

 

 

 

The number of deaths per 1000 individuals for a certain time period

 

Emigration

 

 

 

Movement of individuals out of a population’s area

 

Hibernation

 

 

 

An animal’s state of greatly reduced activity that occurs during winter

 

Immigration

 

 

 

Movement of individuals into a population’s area

 

Limiting factor

 

 

 

An environmental factor that causes a population to decrease in size

 

Natural Selection

 

 

The process by which organisms that are best suited/adapted to their environment are most likely to survive and reproduce

 

Pheromone

 

 

 

A chemical released by one animal that affects the behavior of another animal of the same species

 

Pioneer species

 

 

 

The first species to populate an area during succession

 

Population density

 

 

The number of individuals in an area of a specific size

 

Primary succession

 

 

The series of changes that occur in an area where no soil or organisms exist.

 

Society

 

 

 

A group of closely related animal of the same species that work together in a highly organized way for the benefit of the group

 

Succession

 

 

 

The series of predictable changes that occur in a community over time

 

Territory

 

 

 

An area that is occupied and defended by an animal or group of animals