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PCB 3043: Exam 1 Questions and Correct
Answers/ Latest Update / Already Graded
Ecology
Ans: The scientific study of the relationships between
organisms and their environment
John Graunt
Ans: Used simple mathematical populations to demonstrate
that populations are limited and cannot grow without
restriction
Two Laws of Population Growth:
Ans: 1. Populations have the potential to grow rapidly
2. They can't grow forever at high rates. Populations must be
regulated such that rapid growth is limited phenomenon
Sir Ronald Ross
Ans: Worked as a military physician in India, demonstrated the
malarial oocysts in the gut tissue of female Anopheles mosquito
All rights reserved © 2025/ 2026 |
, Page |2
Doubling time
Ans: The number of years needed to double a population,
assuming a constant rate of natural increase
Population
Ans: A group of individuals that belong to the same species
and live in the same area
Growth rate equation
Ans: Birth rate - Death rate
Demography
Ans: The study of the age structure and growth rate of
populations
Density
Ans: The number of individuals in relation to the space or
volume in which they occur
Distribution
All rights reserved © 2025/ 2026 |
, Page |3
Ans: The geographic and ecological range of a population
Dispersion
Ans: The spacing of individuals with respect to one another
Mark-recapture method
Ans: A sampling technique used to estimate wildlife
populations; individuals (numbering M) are captured, marked,
and released;
we assume that they mix freely and completely with the rest of
the population; then we capture some individuals again, count
the total number of individuals caught (n) and the number of
those that were marked previously (x)
Estimated population size
Ans: N=nM/x; #marked/total number= #marked in
resample/#resampled
Population pyramids
Ans: Show the number of individuals (or percent in different
age classes) going up and down, with males on the left and
females on the right
All rights reserved © 2025/ 2026 |
PCB 3043: Exam 1 Questions and Correct
Answers/ Latest Update / Already Graded
Ecology
Ans: The scientific study of the relationships between
organisms and their environment
John Graunt
Ans: Used simple mathematical populations to demonstrate
that populations are limited and cannot grow without
restriction
Two Laws of Population Growth:
Ans: 1. Populations have the potential to grow rapidly
2. They can't grow forever at high rates. Populations must be
regulated such that rapid growth is limited phenomenon
Sir Ronald Ross
Ans: Worked as a military physician in India, demonstrated the
malarial oocysts in the gut tissue of female Anopheles mosquito
All rights reserved © 2025/ 2026 |
, Page |2
Doubling time
Ans: The number of years needed to double a population,
assuming a constant rate of natural increase
Population
Ans: A group of individuals that belong to the same species
and live in the same area
Growth rate equation
Ans: Birth rate - Death rate
Demography
Ans: The study of the age structure and growth rate of
populations
Density
Ans: The number of individuals in relation to the space or
volume in which they occur
Distribution
All rights reserved © 2025/ 2026 |
, Page |3
Ans: The geographic and ecological range of a population
Dispersion
Ans: The spacing of individuals with respect to one another
Mark-recapture method
Ans: A sampling technique used to estimate wildlife
populations; individuals (numbering M) are captured, marked,
and released;
we assume that they mix freely and completely with the rest of
the population; then we capture some individuals again, count
the total number of individuals caught (n) and the number of
those that were marked previously (x)
Estimated population size
Ans: N=nM/x; #marked/total number= #marked in
resample/#resampled
Population pyramids
Ans: Show the number of individuals (or percent in different
age classes) going up and down, with males on the left and
females on the right
All rights reserved © 2025/ 2026 |
