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Chapter 14 Quiz 2
Final Practice
20
Biology
Undergraduate 2
05/09/2011

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Term
In years when beech trees produced a large crop of nuts, growth rings were narrow. This is best explained by:
Definition
the tradeoff that exists between growth and reproduction.
Term
Density-dependent and density-independent factors influence the growth of a population by causing changes in the:
Definition
birth rate and death rate.
Term
The number of individuals that can be supported in a given habitat is the:
Definition
carrying capacity.
Term
A population pyramid:
Definition
reflects the number of individuals in various age groups in a population.
Term
Life-history patterns:
Definition
are subject to the pressures of natural selection.
Term
Population density is determined by the number of:
Definition
individuals of a species in a given area.
Term
The graph represents the standard demographic transition—the pattern of population growth that is experienced as a country industrializes. In this graph, the green line represents __________________, the red line represents __________________, and the blue curve represents _________________.
Definition
birth rate; death rate; population growth rate
Term
A population with a higher death rate than birth rate may still have positive growth. This statement is:
Definition
correct; if immigration rates plus birth rates are greater than death rate plus emigration rate, population growth will still be positive even if birth rate is lower than death rate alone.
Term
A population:
Definition
is a group of coexisting organisms capable of interbreeding.
Term
When more than two members of the same species live in the same place at the same time, they constitute:
Definition
a population.
Term
Life extension:
Definition
has been achieved using laboratory selection for delayed reproduction.
Term
A population's survivorship curve is a downward-sloping straight line when:
Definition
the mortality rate is constant regardless of age.
Term
The term [(K–N)/K] influences a population growth curve such that:
Definition
when N equals K, population growth is zero.
Term
When plants of a particular species are growing too close to each other, crowding may eventually lead to mortality, known as self-thinning. This type of mortality is:
Definition
density-dependent.
Term
In the equation for logistic growth, when N=K:
Definition
population growth stops.
Term
Natural selection:
Definition
cannot weed out from a population any alleles that do not reduce an individual's relative reproductive success, even if these alleles increase an individual's risk of dying.
Term
The logistic growth rate of a population is BEST represented by the equation:
Definition
rN[(K–N)/K].
Term
A survivorship curve that had low survivorship in the beginning and stabilized after high initial mortality would be characteristic for which type of organism?
Definition
cod
Term
Mutations that cause sickness and death after reproduction:
Definition
can be passed on to future generations.
Term
In the graph, curve A is the ____________________ and curve B is the ___________________.
Definition
xponential growth curve; logistic growth curve
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