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AP Biology > Populations > Flashcards

Flashcards in Populations Deck (15)
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1
Q

The number of organisms in a population per unit area.

A

Population Density

2
Q

Change in population size over time

A

Growth Rate

3
Q

population size is not changing

A

Zero growth rate

4
Q

Population will increase exponentially (J-curve)

A

Exponential Growth

5
Q

Starts out exponential, but levels off at a certain population size (S-curve)

A

Logistic Growth

6
Q

the maximum population size an ecosystem can support, leveling off point

A

Carrying Capacity

7
Q

reproduce fast, have many young, develop quickly. (rabbits)

A

R-selected species

8
Q

reproduce steadily, have few young develop slowly. (kangaroos)

A

K-selected species

9
Q

Factors that have a greater influence on population size as the population increases

A

Density Dependant Factors

10
Q

Factors that have an impact on population size regardless of what the population size is.

A

Density Independent Factors

11
Q

changing of plant communities

A

Succession

12
Q

begins with bare rock from volcanic activity

A

Primary succession

13
Q

begins with soil from a previous community

A

Secondary succession

14
Q

first community

A

Pioneer community

15
Q

ending community

A

Climax community