chapter 2 study guide

Question 1

what is the definition of population?

Answer 1

group of individuals of the same species in the same area at the same time

Question 2

what level of organization relys on the same resources, interacts, and interbreed?

Answer 2

population

Question 3

what are the factors that affect population size?

Answer 3

abiotic, biotic, and intrinsic

Question 4

what is population density?

Answer 4

concentration of individuals

Question 5

what is population distribution?

Answer 5

spacial relations between individuals

Question 6

what are ways to count population?

Answer 6

direct, indirect, random sampling, and mark and recapture

Question 7

what does r stand for?

Answer 7

max growth rate per capita

Question 8

Birth and immgration do what to a population size?

Answer 8

increase

Question 9

death and emigration do what to a poplation size?

Answer 9

decrease

Question 10

what does K stand for?

Answer 10

carrying capacity

Question 11

what is the equation for exponitail growth?

Answer 11

dN/dt=rN

Question 12

what is the equation for logistical growth?

Answer 12

dN/dt=rN (K-N)/K

Question 13

density dependent examples

Answer 13

competition, predation, disease

Question 14

density independent examples

Answer 14

sunlight, rainfall, abiotic factors

Question 15

what is the max sustainable yield?

Answer 15

N=.5K

Question 16

what makes a population r selected?

Answer 16

lots of young, little parental care

Question 17

what makes a population K selected?

Answer 17

small amounts of young, lots of parental care, larger species

Question 18

examples of r selection

Answer 18

fish, plants

Question 19

examples of K selection

Answer 19

elephants, humans,giraffes

Question 20

what is a cohort?

Answer 20

all the same species in the same population at the same time

Question 21

what is a survivorship curve?

Answer 21

percent of cohort surviing at a certain age

Question 22

how many types of curves are there?

Answer 22

three

Question 23

Type 1 is mostly

Answer 23

K selected

Question 24

Type 3 is mostly

Answer 24

r selected

Question 25

Type 1 examples

Answer 25

elephants, giraffes, humans

Question 26

Type 2 examples

Answer 26

rodents, birds

Question 27

type 3 examples

Answer 27

spiders, fish

Question 28

what varible goes on the x axis?

Answer 28

life span (linear scale)

Question 29

What variable goes on the y axis?

Answer 29

percent or number surviving (log scale)

Question 30

when does birth rate decline?

Answer 30

mature industrial

Question 31

when does death rate decline?

Answer 31

early industrial

Question 32

what is the rate of population growth in the first stage?

Answer 32

very slow

Question 33

what is the rate of population growth in the second stage?

Answer 33

rapid

Question 34

what is the rate of population growth in the thrid stage?

Answer 34

slowing

Question 35

what is the rate of population growth in the fourth stage?

Answer 35

very slow

Question 36

do developed or developing countries affect population growth more?

Answer 36

developing