Biology 208 Macewan Final Questions With Complete
Solutions
A fungus absorbs nutrients from a dead log, a squirrel eats the
fungus and a hawk eats the squirrel. Which of the following
about trophic levels in this food chain is true? Correct Answers
the fungus is a primary decomposer
A population of ground squirrels has an annual per capita birth
rate of 0.06 and an annual per capita death rate of 0.02.
Calculate an estimate of the total number of individuals added to
(or lost from) a population of 1000 individuals in one year.
Correct Answers 40 individuals added
A researcher wants to know if gene flow is contributing to
evolution of drought tolerance of pitcher plants in a specific bog.
As a control, she should: Correct Answers determine if the
population is in Hardy-Weinberg equilibrium
Absolute density Correct Answers The number of individuals of
a population per unit
Age distribution Correct Answers calculate difference in
proportion of individuals in each age class
- assumes differences in number from one age class to next due
to mortality
-assumes population stable in size
-looking at age distribution in each class
- work for population that is stable
,Age distribution Correct Answers Population reflects history of
survival, reproduction, and growth potential
It indicates:
- periods of successful reproduction, high or low juvenile and
adult survival
- whether the older individuals in a population are being
replaced
- population is declining
Albedo Correct Answers Reflectivity of the landscape
All of the following are examples of biotic factors that can
contribute to species' range limits, EXCEPT for... Correct
Answers availability of fresh water
Animals that help other animals of the same species ________.
Correct Answers are usually related to the other animals helped
Any process in which a signal from one individual modifies the
behavior of a recipient individual is termed ________. Correct
Answers communication
Aposematic coloration Correct Answers bright and conspicuous
coloration displays by many toxic or distasteful potential prey
species
Aposematic Colouration Correct Answers Bright or distinct
colouration in prey, which advertises that prey are toxic or are
distasteful
,Approximately how many kilograms (kg) of carnivore
(secondary consumer) biomass can be supported by a field plot
containing 1000 kg of plant material? Correct Answers 10
Aquatic Temperature Correct Answers Aquatic environment are
more thermally stable; Stability varies with depth
arbuscular mycorrhizae Correct Answers produce arbuscules,
site of exchange between plants and fungi; hyphae, fungal
filaments; and vesicles, enegy storage organ
-directly associated with the cell of the plants
As you study two closely related predatory insect species, the
two-spot and the three-spot avenger beetles, you notice that each
species seeks prey at dawn in areas without the other species.
However, where their ranges overlap, the two-spot avenger
beetle hunts at night and the three-spot hunts in the morning.
When you bring them into the laboratory and isolate the two
different species, you discover that the offspring of both species
are found to be nocturnal. You have discovered an example of
________. Correct Answers resource partitioning (niche
differentiation)
Autotrophs Correct Answers Use inorganic sources of C &
energy; photosynthesis: use CO2 for C and sunlight as energy ;
Chemosynthetic: Use (oxidation of) inorganic molecules as
sources of C & energy
Batesian mimicry Correct Answers evolution of a nontoxic
species to resembles a poisonous or inedible species
, Batesian mimicry Correct Answers Non-toxic species exhibits
colouration similar to that of noxious species living in the same
area
Behavioural ecology Correct Answers Study of relationships
between organisms and their environment that are mediated by
behaviour
Benefits of plants Correct Answers 1) increased water
absorption: increase root surface area, in turn increases contact
with moisture and surface area for absoprtion of water
2) inorganic nutrients: fixes nitrogen, phosphorus, and
micronutrients, necessary for growth (an often limiting)
C3 photosynthesis Correct Answers Used by most plants and
algae; CO2 + RuBP+ Enzyme (RUBISCO) --> Phosphoglyceric
acid ; Plants must allow stomata to open to allow CO2 in :
allows water to escape, H2O flows out faster than CO2 in
C4 photosynthesis Correct Answers Fixation of C and light
dependent reactions occur in different cells; reduces water loss
by reducing he need to open the stomata; requires more energy
CAM photosynthesis Correct Answers Succulent plants; arid
environments; light dependent reactions and c fixation occur in
the same cell but different times; c-fixation occurs at night
(reduces water loss)
capture efficiency(b) Correct Answers the proportion of
encounters between predators and prey that results in the
predator capturing (and it's assume eating)
Solutions
A fungus absorbs nutrients from a dead log, a squirrel eats the
fungus and a hawk eats the squirrel. Which of the following
about trophic levels in this food chain is true? Correct Answers
the fungus is a primary decomposer
A population of ground squirrels has an annual per capita birth
rate of 0.06 and an annual per capita death rate of 0.02.
Calculate an estimate of the total number of individuals added to
(or lost from) a population of 1000 individuals in one year.
Correct Answers 40 individuals added
A researcher wants to know if gene flow is contributing to
evolution of drought tolerance of pitcher plants in a specific bog.
As a control, she should: Correct Answers determine if the
population is in Hardy-Weinberg equilibrium
Absolute density Correct Answers The number of individuals of
a population per unit
Age distribution Correct Answers calculate difference in
proportion of individuals in each age class
- assumes differences in number from one age class to next due
to mortality
-assumes population stable in size
-looking at age distribution in each class
- work for population that is stable
,Age distribution Correct Answers Population reflects history of
survival, reproduction, and growth potential
It indicates:
- periods of successful reproduction, high or low juvenile and
adult survival
- whether the older individuals in a population are being
replaced
- population is declining
Albedo Correct Answers Reflectivity of the landscape
All of the following are examples of biotic factors that can
contribute to species' range limits, EXCEPT for... Correct
Answers availability of fresh water
Animals that help other animals of the same species ________.
Correct Answers are usually related to the other animals helped
Any process in which a signal from one individual modifies the
behavior of a recipient individual is termed ________. Correct
Answers communication
Aposematic coloration Correct Answers bright and conspicuous
coloration displays by many toxic or distasteful potential prey
species
Aposematic Colouration Correct Answers Bright or distinct
colouration in prey, which advertises that prey are toxic or are
distasteful
,Approximately how many kilograms (kg) of carnivore
(secondary consumer) biomass can be supported by a field plot
containing 1000 kg of plant material? Correct Answers 10
Aquatic Temperature Correct Answers Aquatic environment are
more thermally stable; Stability varies with depth
arbuscular mycorrhizae Correct Answers produce arbuscules,
site of exchange between plants and fungi; hyphae, fungal
filaments; and vesicles, enegy storage organ
-directly associated with the cell of the plants
As you study two closely related predatory insect species, the
two-spot and the three-spot avenger beetles, you notice that each
species seeks prey at dawn in areas without the other species.
However, where their ranges overlap, the two-spot avenger
beetle hunts at night and the three-spot hunts in the morning.
When you bring them into the laboratory and isolate the two
different species, you discover that the offspring of both species
are found to be nocturnal. You have discovered an example of
________. Correct Answers resource partitioning (niche
differentiation)
Autotrophs Correct Answers Use inorganic sources of C &
energy; photosynthesis: use CO2 for C and sunlight as energy ;
Chemosynthetic: Use (oxidation of) inorganic molecules as
sources of C & energy
Batesian mimicry Correct Answers evolution of a nontoxic
species to resembles a poisonous or inedible species
, Batesian mimicry Correct Answers Non-toxic species exhibits
colouration similar to that of noxious species living in the same
area
Behavioural ecology Correct Answers Study of relationships
between organisms and their environment that are mediated by
behaviour
Benefits of plants Correct Answers 1) increased water
absorption: increase root surface area, in turn increases contact
with moisture and surface area for absoprtion of water
2) inorganic nutrients: fixes nitrogen, phosphorus, and
micronutrients, necessary for growth (an often limiting)
C3 photosynthesis Correct Answers Used by most plants and
algae; CO2 + RuBP+ Enzyme (RUBISCO) --> Phosphoglyceric
acid ; Plants must allow stomata to open to allow CO2 in :
allows water to escape, H2O flows out faster than CO2 in
C4 photosynthesis Correct Answers Fixation of C and light
dependent reactions occur in different cells; reduces water loss
by reducing he need to open the stomata; requires more energy
CAM photosynthesis Correct Answers Succulent plants; arid
environments; light dependent reactions and c fixation occur in
the same cell but different times; c-fixation occurs at night
(reduces water loss)
capture efficiency(b) Correct Answers the proportion of
encounters between predators and prey that results in the
predator capturing (and it's assume eating)
