Population and Human Dynamics

Question 1

all members of a single species living in a specific area at the same time

Answer 1

population

Question 2

number of individuals (individuals)

Answer 2

population size

Question 3

number of individuals living in a given area (individuals/km2)

Answer 3

population density

Question 4

number of live births added annually per 1000 individuals

Answer 4

birthrate (natality)

Question 5

number of deaths added annually per 1000 individuals

Answer 5

deathrate (mortality)

Question 6

movement of individuals into a population

Answer 6

immigration

Question 7

movement of individuals out of a population

Answer 7

emigration

Question 8

number of males with respect to number of females

Answer 8

sex ratio

Question 9

3 age distribution

Answer 9

pre-reproductive juveniles
reproductive adults
post-reproductive adults

Question 10

2 types of growth

Answer 10

exponential and logistic

Question 11

an increase in individuals per unit of time
“growth with no limit”

Answer 11

exponential growth rate

Question 12

the maximum population size of a biological species that can be sustained by that specific environment

Answer 12

carrying capacity

Question 13

changes in growth over time
(growth slows when approaching carrying capacity)

Answer 13

logistic growth rate

Question 14

factors that prevent the further increase of the population

determines an ecosystem’s carrying capacity

Answer 14

limiting factors

Question 15

the totality of all limiting factors

Answer 15

environmental resistance

Question 16

4 factors affecting growth

Answer 16

external factors
internal factors
density-dependent factors
density-independent factors

Question 17

factor affecting growth-
habitat quality, food availability, interactions

Answer 17

external factors

Question 18

factor affecting growth-
slow growth and maturity, body size, metabolism, hormonal status, etc.

Answer 18

internal factors

Question 19

factor affecting growth-
effect intensifies with increase in population size

Answer 19

density-dependent factors

Question 20

factor affecting growth-
population affected no matter what size (often abiotic)

Answer 20

density-independent factors

Question 21

usually small, high reproductive rate, high mortality, ignored offspring

depend on high rate of reproduction and growth

Answer 21

r-strategists

Question 22

tend to be large, live long lives/mature slowly, care for offspring, low reproductive rate, low mortality

adapted for slower growth conditions near carrying capacity

Answer 22

K-strategists

Question 23

survivorship- most individuals die late in life

Answer 23

Type 1

Question 24

survivorship- individuals die at a uniform rate

Answer 24

type 2

Question 25

survivorship- most individuals die at a young age

Answer 25

type 3