Population Changes And Population Interactions

Question 1

Population density

Answer 1

N/A or V

Question 2

Clumped Dispersion

Answer 2

Individuals are concentrated on areas

Ex. Trees

Question 3

Uniform Dispersion

Answer 3

Equally spaced out

Ex. Grass

Question 4

Random Dispersion

Answer 4

An unpredictable to pattern

Ex. Flowers in a field

Question 5

Natality

Answer 5

Number of births

Question 6

Mortality

Answer 6

Number of deaths

Question 7

Immigration

Answer 7

Moving into a population

Question 8

Emigration

Answer 8

Moving out of a population

Question 9

Growth Rate

Answer 9

Describes die quickly a population is increasing or decreasing

Question 10

Per Capita Growth Rate

Answer 10

Represents the change in a populations size relative to the initial population size

Question 11

Open Population

Answer 11

Allows things to enter and leave the population

Question 12

Closed population

Answer 12

Does not allow things to enter or leave

Question 13

Exponential Growth

Answer 13

Size increases as a fixed rate per time

Question 14

Environmental Resistance

Answer 14

And factor limiting a populations ability to reach its biotic potential

Question 15

Biotic Potential

Answer 15

Maximum number of offspring a species could produce with unlimited resources

Question 16

Growth curves

Answer 16

Show population growth

Question 17

Density-Dependent Factors

Answer 17

Factor that influences a population due to its density

Question 18

Density-Independent Factors

Answer 18

A factor that influences a population regardless of the population
Ex. Fire/Flood

Question 19

Intra-Specific Competition

Answer 19

An interaction between the same species as they compete for resources
Ex. Ducks fighting over nesting sites

Question 20

Inter-Specific Competition

Answer 20

An interaction between different species as they compete for resources
Ex. Ducks and geese fighting over nesting sites

Question 21

K-Selected Strategy

Answer 21

• Long life span
• Low birth rate
• Low number of offspring
• Care for young
• Usually large animal

Question 22

R-Selected Strategy

Answer 22

• Short life span
• High birth rate
• High number of offspring
• Don’t care for young
• Usually a small animal

Question 23

Predator prey cycles

Answer 23

Species interacting in a community

Question 24

Mimicry

Answer 24

Organisms trying to mimic another organism or specific object

Question 25

Camouflage

Answer 25

Organisms try to blend into the background or habitat

Question 26

Symbiosis

Answer 26

Organisms of two different species live in close, usually physical contact

Question 27

Parasitism

Answer 27

One benefits and the other is harmed

+ -

Question 28

Commensalism

Answer 28

One benefits and the other doesn’t care

+ -

Question 29

Mutualism

Answer 29

Both organisms benefit

++

Question 30

Succession

Answer 30

Is the slow replacement of one community of plants by another
Ex. Plants taking over and area

Question 31

Primary succession

Answer 31

Plants take over and area not previously covered by plants

-slow due to lack of nutrients

Question 32

Secondary succession

Answer 32

Plants take over an area that was previously covered by plants

Question 33

Pioneer community

Answer 33

These are the first plants to arrive during succession

-Usually weeds

Question 34

Climax community

Answer 34

These are the last plants to arrive, depending on the biome this is happening to

Question 35

Population size

Answer 35

The number of organisms