Determining Population Size

Question 1

What are the three methods used to determine population size

Answer 1

observation
sampling
mark/capture

Question 2

Direct observation

Answer 2

observer is directly involved with population being studies

population is aware of the observer’s presence

Question 3

Indirect observation

Answer 3

population is observed from a distance

population is unaware of observer presence

Question 4

Sampling

Answer 4

number of members of one species in a specific area are counted
values are used to estimate the total population

Question 5

Mark/recapture

Answer 5

samples of a specific population are captured, marked, and released
later samples use the ratio of marked/unmarked organisms to estimate population

Question 6

Conservation biology

Answer 6

studies effect of humans on the environment and methods of conserving biological diversity

Question 7

What are the factors affecting population growth

Answer 7

density-dependent factors

density-independent factors

Question 8

Density-dependent factors

Answer 8

predation, disease, crowding, and stress

Question 9

Density-independent factors

Answer 9

natural disasters, human impact, temperature, or organism behavior

Question 10

Exponential growth show a …….. shaped growth curve

Answer 10

J

Question 11

What type of species shows exponential growth

Answer 11

R-selected species

Question 12

In exponential growth, population is multiplied by a value greater than …..

Answer 12

1

Question 13

The higher the multiple of exponential growth, the ……. the growth curve

Answer 13

steeper

Question 14

Logistic growth shows a …. shaped growth curve

Answer 14

S

Question 15

What type of species show logistic growth

Answer 15

K-selected species

Question 16

In logistic growth, population grows …….., then growth ……. as carrying capacity is reached

Answer 16

exponentially; slows

Question 17

Logistic growth is ….. dependent

Answer 17

density

Question 18

Population density

Answer 18

total number of organisms in region divided by land area in km squared or mi squared

Question 19

What was the U.S. Census established by

Answer 19

U.S Constitution

Question 20

The U.S Census performed once every

Answer 20

10 years since 1790

Question 21

The U.S Census divded the country into

Answer 21

12 regions