BIO 265 EXAM 2 UH MANOA JUSTIN WALGUARNEY EXAM NEWEST
2024 WITH COMPLETE QUESTIONS AND CORRECT VERIFIED
ANSWERS (DETAILED ANSWERS) ALREADY GRADED A+ 100%
GUARANTEED TO PASS CONCEPTS!!!
What is the Definition of Population? - ANSWER-A group of individuals of a
single species living in the same general Area.-Have same resources -Influenced
by same enviromental factors -Likely to interact and breed with one another.
What is Population Genetics? - ANSWER-Uses math and empirical studies to
understand allele frequency distributions and changes, including those that
lead to adaptation and speciation
What is Population Ecology? - ANSWER-Study of populations in relation to their
environment.
What are the 4 environmental influences? - ANSWER-1)Density 2)Distribution
3)Age structure 4)Dynamics (changes in size)
What is a closed population? - ANSWER-Where membership is stable. Changes
in Population only happen through Birth or Death.
What is an open population? - ANSWER-Where membership (# in pop) can
change. This can be due to immigration and emigration as well as Birth and
death.
,What is Population Density? - ANSWER-Result of an interplay between process
that add individuals to a population and those that remove individuals (Births
and Immigration add whereas Deaths and Emigration remove)
What are some simple cast assumptions for annual plants and insects? -
ANSWER-1)Rate of reproduction of an individual remains constant.2)Individuals
only breed once, generations do not overlap.
Another Simple Case assumption? - ANSWER-The rate at which a population
increases is a simple multiple of the number of individuals already present in
the populations.Ex: Gen 1: 10 Individ Gen 2: 10 X 2 Indiviud Gen 3: 10 X 4
indivud
What is the Exponential Population equation? - ANSWER-N(t)=R^t * N(i)
Ex: What is the population size if we start with 1000 individuals with net
replacement rate per generation of 2 and watch them increase for 5
generations?N(5)= 2^5 x 1000 = 32,000
What is the rate of increase if it increases in size by 50% in one generation? -
ANSWER-R= 1.5
A population was observed to increase from 5000 to 6000 individuals in one
year, What is the rate of increase? - ANSWER-Rate of increase = 6000/5000
How to figure out rate of increase? - ANSWER-Population Final/Population
Initial
, What is the exponential growth equation for continuous breeding? - ANSWER-
dN/dt= B-D = (b-d)N =rNr= b-d ( INTRINSIC RATE OF INCREASE)B= instantaneous
birth rate(B=b *N) (b=avg birth rate)D= instantaneous death rate. (D=d*N) (d=
avg death rate)
What is r? - ANSWER-Intrinsic Rate of increase Also gives the slope of the line
dN/dT
What does it mean when r=0? - ANSWER-No change in numbers over
time.dN/dt= 0
What if r is less than 0 (Negative? - ANSWER-Population will decline over
timedN/dt is negative
What if r is positive? - ANSWER-Population will increase over time.dN/dt is
positive
What is the integral form for exponential growth? - ANSWER-N(t)= N(0) * e^rt
N(0)=Initial Population N(t)= Population at t e= 2.71828 r is intrinsic rate of
increase
Difference between the differential form and integral form of population
growth? - ANSWER-Differential form (dN/dt=rN) finds the CHANGE in
population size.Integral form (Nt=N0*e^rt) finds the actual new population
size.
Important thing to remember about exponential growth. - ANSWER-If it is
positive, it will increase exponentially and forever. HOWEVER, no organism can
increase indefinitely, so the logistic model has a limit modification to the
equation.As size/growth exponentially increases, it will decrease growth in
population.
2024 WITH COMPLETE QUESTIONS AND CORRECT VERIFIED
ANSWERS (DETAILED ANSWERS) ALREADY GRADED A+ 100%
GUARANTEED TO PASS CONCEPTS!!!
What is the Definition of Population? - ANSWER-A group of individuals of a
single species living in the same general Area.-Have same resources -Influenced
by same enviromental factors -Likely to interact and breed with one another.
What is Population Genetics? - ANSWER-Uses math and empirical studies to
understand allele frequency distributions and changes, including those that
lead to adaptation and speciation
What is Population Ecology? - ANSWER-Study of populations in relation to their
environment.
What are the 4 environmental influences? - ANSWER-1)Density 2)Distribution
3)Age structure 4)Dynamics (changes in size)
What is a closed population? - ANSWER-Where membership is stable. Changes
in Population only happen through Birth or Death.
What is an open population? - ANSWER-Where membership (# in pop) can
change. This can be due to immigration and emigration as well as Birth and
death.
,What is Population Density? - ANSWER-Result of an interplay between process
that add individuals to a population and those that remove individuals (Births
and Immigration add whereas Deaths and Emigration remove)
What are some simple cast assumptions for annual plants and insects? -
ANSWER-1)Rate of reproduction of an individual remains constant.2)Individuals
only breed once, generations do not overlap.
Another Simple Case assumption? - ANSWER-The rate at which a population
increases is a simple multiple of the number of individuals already present in
the populations.Ex: Gen 1: 10 Individ Gen 2: 10 X 2 Indiviud Gen 3: 10 X 4
indivud
What is the Exponential Population equation? - ANSWER-N(t)=R^t * N(i)
Ex: What is the population size if we start with 1000 individuals with net
replacement rate per generation of 2 and watch them increase for 5
generations?N(5)= 2^5 x 1000 = 32,000
What is the rate of increase if it increases in size by 50% in one generation? -
ANSWER-R= 1.5
A population was observed to increase from 5000 to 6000 individuals in one
year, What is the rate of increase? - ANSWER-Rate of increase = 6000/5000
How to figure out rate of increase? - ANSWER-Population Final/Population
Initial
, What is the exponential growth equation for continuous breeding? - ANSWER-
dN/dt= B-D = (b-d)N =rNr= b-d ( INTRINSIC RATE OF INCREASE)B= instantaneous
birth rate(B=b *N) (b=avg birth rate)D= instantaneous death rate. (D=d*N) (d=
avg death rate)
What is r? - ANSWER-Intrinsic Rate of increase Also gives the slope of the line
dN/dT
What does it mean when r=0? - ANSWER-No change in numbers over
time.dN/dt= 0
What if r is less than 0 (Negative? - ANSWER-Population will decline over
timedN/dt is negative
What if r is positive? - ANSWER-Population will increase over time.dN/dt is
positive
What is the integral form for exponential growth? - ANSWER-N(t)= N(0) * e^rt
N(0)=Initial Population N(t)= Population at t e= 2.71828 r is intrinsic rate of
increase
Difference between the differential form and integral form of population
growth? - ANSWER-Differential form (dN/dt=rN) finds the CHANGE in
population size.Integral form (Nt=N0*e^rt) finds the actual new population
size.
Important thing to remember about exponential growth. - ANSWER-If it is
positive, it will increase exponentially and forever. HOWEVER, no organism can
increase indefinitely, so the logistic model has a limit modification to the
equation.As size/growth exponentially increases, it will decrease growth in
population.
