BIO 207 - Midterm 3 UPDATED ACTUAL
Exam Questions and CORRECT Answers
Define Ecology - CORRECT ANSWER - The scientific study of the interactions among
organisms and their physical environment
Define population - CORRECT ANSWER - A group of organisms of one species that
interbreed and live in the same place at the same time
Define species - CORRECT ANSWER - groups of interbreeding natural populations that
are reproductively isolated from other such groups
Define Community - CORRECT ANSWER - an ecological unit of interacting organisms
composed of many species, found in a particular
environment.
Define Ecosystem - CORRECT ANSWER - a community and its physical environment,
including all the interactions that occur between them.
What are the basic factors in Population Ecology? - CORRECT ANSWER -
1)DISPERSION: The distribution patterns of the individuals
within the population in space and time.
2)POPULATION GROWTH: The change (+/-) in the number of
individuals within the population over time
3)AGE STRUCTURE: The age distribution of the population
What are the 3 types of dispersion patterns? - CORRECT ANSWER - 1) RANDOM: An.
individual has an equal probability of occuring anywhere in an area
, 2) REGULAR: Individuals are uniformly spaced through the environment.
3) CLUMPED: Individuals live in a rea of high local abundance, which are separated by areas of
low abundance
What are the three processes of the dispersion patterns? - CORRECT ANSWER - 1)
RANDOM: Neutral interactions between individuals and local environment
2) REGULAR: Antagonistic interactions between individuals or local depletion of resources
3) CLUMPED: Attraction between indivuals or attraction to a common resource
What is the equation for population density? - CORRECT ANSWER - # of individuals /
unit area
What are the four main aspects of population growth? - CORRECT ANSWER - - Birth (+)
- Death (-)
- Immigration (+)
- Emigration (-)
What is a J-slope (in reference to population growth)
What does it mean if it steep or shallow? - CORRECT ANSWER - - J-slope shows the
population growth of a species (dN/dt)
- Steep slope = high rate of growth
- Shallow slope = slower rate of growth
A biologist is studying a group of sharks: Hammerheads and Tigers. Hammerheads have a dN/dt
score of 1.0, while Tigers have a dN/dt score of 0.5. what does this mean - CORRECT
ANSWER - - Hammerheads have a higher rate of growth than Tigers
- Hammerheads reproduce 50% faster than tigers
Exam Questions and CORRECT Answers
Define Ecology - CORRECT ANSWER - The scientific study of the interactions among
organisms and their physical environment
Define population - CORRECT ANSWER - A group of organisms of one species that
interbreed and live in the same place at the same time
Define species - CORRECT ANSWER - groups of interbreeding natural populations that
are reproductively isolated from other such groups
Define Community - CORRECT ANSWER - an ecological unit of interacting organisms
composed of many species, found in a particular
environment.
Define Ecosystem - CORRECT ANSWER - a community and its physical environment,
including all the interactions that occur between them.
What are the basic factors in Population Ecology? - CORRECT ANSWER -
1)DISPERSION: The distribution patterns of the individuals
within the population in space and time.
2)POPULATION GROWTH: The change (+/-) in the number of
individuals within the population over time
3)AGE STRUCTURE: The age distribution of the population
What are the 3 types of dispersion patterns? - CORRECT ANSWER - 1) RANDOM: An.
individual has an equal probability of occuring anywhere in an area
, 2) REGULAR: Individuals are uniformly spaced through the environment.
3) CLUMPED: Individuals live in a rea of high local abundance, which are separated by areas of
low abundance
What are the three processes of the dispersion patterns? - CORRECT ANSWER - 1)
RANDOM: Neutral interactions between individuals and local environment
2) REGULAR: Antagonistic interactions between individuals or local depletion of resources
3) CLUMPED: Attraction between indivuals or attraction to a common resource
What is the equation for population density? - CORRECT ANSWER - # of individuals /
unit area
What are the four main aspects of population growth? - CORRECT ANSWER - - Birth (+)
- Death (-)
- Immigration (+)
- Emigration (-)
What is a J-slope (in reference to population growth)
What does it mean if it steep or shallow? - CORRECT ANSWER - - J-slope shows the
population growth of a species (dN/dt)
- Steep slope = high rate of growth
- Shallow slope = slower rate of growth
A biologist is studying a group of sharks: Hammerheads and Tigers. Hammerheads have a dN/dt
score of 1.0, while Tigers have a dN/dt score of 0.5. what does this mean - CORRECT
ANSWER - - Hammerheads have a higher rate of growth than Tigers
- Hammerheads reproduce 50% faster than tigers
