Exam 3 Flashcards
Which of the following factors does NOT affect the distribution of species?
a. competition
b. behavior
c. wind
d. sex ratio
e. all will have an effect on species distribution
E.
Which of the following below would NOT be used to develop a life table?
a. r or the intrinsic rate of natural increase
b. bx
c. lx
d. lx*mx
A.
Populations size will level off at the _____ of an environment.
a. environmental resistance
b. population growth
c. population density
d. carrying capacity
D.
In human history, the development of agriculture was a key factor leading to rapid growth of human populations because:
a. greater food availability allowed human groups to remain in one place and grow
b. more food increased r.
c. greater food availability raised K.
d. Stable and enhanced food production meant that families could have more offspring that survived to adulthood.
e. All of the above
E
You could test whether 2 species of birds compete with on another for food by:
a. seeing whether areas that many robins also have abundant sparrow populations
b. observing whether you more often find robins and sparrows together in the same or apart in different habitats
c. doing an experiment in which you measure age-specific survival and reproduction of robins and sparrows at different densities.
d. doing an experiment in which you have some areas of robins + sparrows living together and other areas where either one of the two species is removed. Then measure survival and offspring production for both in each area
D.
In Resource partitioning:
a. the predation principle becomes dominant
b. sympatric species are able to coexist by using resources differently.
c. competitive exclusion will drive on species to extinction locally.
d. each species will allow other species to share the same resources
B
The MSY (maximum sustainable yield) in fisheries is ideally:
a. .5K
b. K
c. N-K
d. found at the beginning of population growth of indicated species
e. impossible to determine
A
Which of the following is NOT an example of aposematic coloration?
a. the pattern of red, black, and yellow on a coral snake
b. the color pattern of a monarch butterfly
c. a seahorse disguised to look like Sargassum seaweed
d. a bright blue tree frog in the amazon
C.
An example of animals that are regulated by density independent effects might be?
a. redwood trees growing in California
b. red-winged black birds in a cattail marsh eating insects
c. thrips living in roses during the heat of summer
d. buffalo grazing on a prairie
e. all of the above
C.
The intermediate disturbance hypothesis (IDH) predicts that:
a. intermediate disturbances maximize competitive exclusion .
b. species diversity is highest when disturbances are intermediate
c. most communities are at an intermediate stage of succession.
d. most disturbances are intermediate in intensity
B.
If the rank abundance curve has a high slope value, it indicates a/an ____ amount of diversity in the community compared to a curve with a lower slope value.
a. low
b. high
c. equal
d. zero (none)
A
How much energy from the sun do primary producers actually use in their energy conversions
a. less than 1%
b. less than 5%
c. 10%
d. about half (50%)
A
