final bio Flashcards
a gene pool consists of
the total of all alleles in a population
evolution occurs
only via natural selection, genetic drift, migration, ….
natural selection can only act on traits
that are heritable
____ selection favors organisms with phenotypes that are at one extreme relative to the average phenotype
directional
which of the following best explains why genetic drift botttlenecks and founder effects are voluntarily important?
both result in small populations that are influenced by genetic drift
from an evolutionary perspective behavior can be viewed best as
a trait that can satisfy the three conditions required….
which of the following is the best way to distinguish male from female
mobile gametes
in a polyandrous mating system
multiple males tend to mate with the same female
which if the following is an example of a female mating with a male only after submitting him to a courtship ritual?
a female bower bird
because it is possible for a female to mate with multiple males, any of whom could be the father, male mammals and birds will always
have some degree of paternity uncertainty
behaviors that do not require environmental input for their development are called
instincts
the biological species concept
a species as any group interbreeding species that produce viable offspring
prokaryotes are classified into ___ domains
2
in one sense, microevolution is ____ and macroevolution is ____
process, result
speciation with geographic isolation is called
allopatric speciation
which of the following is NOT a prezygotic barrier to interbreeding between different species?
hybrids between the two species are infertile
the three most fundamental groups of organisms on the planet are
bacteria, archaea, eukarya
pathogenic bacteria are bacteria that
cause disease
all of the living organisms that we can see with the naked eye are
in the domain eukarya
if there are 800 individuals in a population at the start of a year and during the year 200 offspring are produced in that population then the annual birth rate is
.25
life histories are based on
all of the above
a population pyramid
reflects the number of individuals in various age groups in a population
which of the following is a major tradeoff in life histories
Growth for reproduction
one benefit one unaffected
commensalism
the pressure flow mechanism in trees explains how
how sap moves through phloem.
secondary plant growth causes a plant to
increase in girth
which if the following terms includes all of the others in the list
vascular plant
which of the following is characteristic of a gymnosperms
they are wind pollinated
which of the following is not a factor that limits population growth
all of these factors limit population growth
ozone depletion is a cause for concern because
rates of skin cancer are likely to increase
which of the following is currently the leading cause of extinction
habitat loss
a species found only within a certain region is said to be ___ to that region
endemic
biodiversity ___ have been identified based on high biodiversity and imminent threats caused by human activities
hotspots
which of the following is an example of an abiotic factor
mean annual rainfall in the rainforest
an ecosystem
all living and nonliving things
in a population exhibiting logistic growth, what happened when the carrying capacity is exceeded
growth rate becomes negative until within the carrying capacity
density dependent and density independent factors influence the growth of population by causing changes in the
birth rate and death rate
