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IB150 learning goals exam 1 Questions With Complete Solutions
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IB150 learning goals exam 1 Questions With Complete Solutions
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IB150 learning goals exam 1 Questions With CompleteSolutions
be able to define and distinguish endothermy and ectothermy
and homeothermy and poikilothermy. Correct Answer
endothermy- humans,produce our own heat
ectothermy- heat from outside source
homeothermy- can maintain steady body temperature
poikilothermy-body temp varies (enzymes have to operate at
lower efficiency for some time during the day compared to
homeotherms)
be able to draw a graph that illustrates activation energy in a
graph of the time course of a chemical reaction Correct Answer
activation energy results from unstable transition states; energy
associated with the breaking of covalent bonds
be able to identify the most common sources of chemical PE
Correct Answer ATP?
be able to use these terms in context: catalyst, enzyme, active
site Correct Answer enzymes contain a region called the active
site that provides a chemical environment conductive for
forming intermediate stages of a chemical reaction
character displacement Correct Answer over many generations,
competition may also cause a change in the characteristics of
competing species
compare and contrast density-dependent and density-
independent limits on population growth and provide examples
, of each Correct Answer density-dependent: that cause death
rates to rise as population size increases= competition for
resources, disease (spread more quickly in a high density
environment), and predation (good hiding places are scarce)
density-dependent: that cause birth rates to drop as pop. size
increases= competition leading to malnourishment (lack of
energy to invest in making offspring), and stress from
overcrowding
density-independent: cause population decline regardless of
population density and hence do not lead to logistic growth
curves, but erratic declines in population size= natural
catastrophe and habitat loss due to land use
competitive exclusion Correct Answer in the absence of
resource partitioning, the inferior competitor may become
locally extinct
contrast r- and K-selected life history strategies and identify
what life-history factors each life-history strategy maximizes
Correct Answer r-strategists: lay hundreds of eggs, increasing
birth rate and death rate for offspring is often high (mother
might exhaust her own resources from producing so many
offspring-may not be able to care for all her young)
K-strategist- only 1 offspring at a time and often only every 4
years, care for their offspring but reduce the death rate
define and contrast gross primary production (GPP) and net
primary production (NPP) Correct Answer GPP- 100%
captured sunlight
NPP- 10% plant growth, what is actually used for growth and
reproduction, energy available at various trophic levels
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