quiz #5 Flashcards
in order to determine whether a species is common or rare, ecologists use all of the following criteria except:
a) none of the choices are correct
b) local population size
c) evolutionary existence
d) geographical range
e) habitat tolerance
c) evolutionary existence
“rarity I” can be described as:
a) extensive range, narrow habitat tolerances, large local populations
b) restricted range, broad habitat tolerances, large local populations
c) extensive range, broad habitat tolerances, small local populations
d) restricted range, broad habitat tolerances, small local populations
e) restricted range, narrow habitat tolerances, small local populations
c) extensive range, broad habitat tolerances, small local populations
true/false: in general, research indicates that as the average body mass of an organism increases, population density also increases
false
the Africanized honeybee stopped spreading southward through South America by about 1983 in response to:
a) introduction of a species-specific parasite as a means of biological control
b) aggressive pest control measures
c) none of the choices are correct
d) unfavorable climatic factors
e) severe competition with the closely related European honeybee
d) unfavorable climatic factors
true/false: many sedentary organisms have a “dispersing stage” and rely on vectors such as animals, water, or wind to aid in their spread
true
type II survivorship curve indicates:
a) low juvenile mortality and low mortality in older adults
b) high juvenile mortality and high mortality in older adults
c) low juvenile mortality and high mortality in older adults
d) equal chance of dying at any age
e) high juvenile mortality and low mortality in older adults
d) equal chance of dying at any age
which of the following are characteristics of a population?
a) has a birth rate
b) all of the choices are correct
c) has an emigration rate
d) has an age distribution
e) consists of a single species
b) all of the choices are correct
humans would best be represented by which of the following survivorship curves?
a) I
b) none of the choices are correct
c) II
d) III
e) IV
a) I
in stream environments, the downstream drift of organisms is countered by the upstream movements in addition to reproduction. what is the name for this process?
a) survivorship curve
b) spates
c) population dynamics
d) colonization cycle
d) colonization cycle
_______ is/are defined as a group of potentially breeding organisms within a species in a given space and time
a) populations
b) distribution
c) community
d) abundance
e) density
a) populations
true/false: often small-scale distribution patterns gathered from mountain gradients can be used to draw conclusions about large scale distribution patterns
true
true/false: the creosote bush (Larrea tridentata) can have a random, clumped, or regular distribution pattern
true
