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BIO 265 Exam 2 UH Manoa Justin Walguarney. Exam Questions and Answers 100% Pass R217,39
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BIO 265 Exam 2 UH Manoa Justin Walguarney. Exam Questions and Answers 100% Pass
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BIO 265 Exam 2 UH Manoa Justin Walguarney. Exam Questions and Answers 100% Pass What is the Definition of Population? - answerA 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 ...

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  • October 28, 2024
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  • 2024/2025
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©BRIGHTSTARS EXAM SOLUTIONS
10/22/2024 12:14 PM


BIO 265 Exam 2 UH Manoa Justin
Walguarney. Exam Questions and Answers
100% Pass



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

, ©BRIGHTSTARS EXAM SOLUTIONS
10/22/2024 12:14 PM

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.

How do you figure the stable population size occur? (Hint: Equation) - answer✔N=(b0
d0)/(kb+kd)
When Birth Rate-Death rate/ Sum of carrying capacty THIS IS ALSO THE CARRYING
CAPACITY (Max Sustainable Pop Size)

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