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25 terms

Ecology CH. 11 Book Question

STUDY
PLAY
In general, the per capita birth rate__________ with increasing population density and the per capita death rate __________.
decreases, increases
The exponential model of population growth assumes that resources are __________ and that the environment is __________.
unlimited, constant
According to the logistic model of population growth, the maximum rate of growth
occurs at intermediate population densities.
The _____________ is the maximum population size that can be supported by normal environmental conditions.
carrying capacity
Which of the following statements about human populations is false?
Technology will allow human populations to grow and remain over the Earth's carrying capacity.
Which of the following effects impact populations relative to their size?
density-dependent effects
Which of the following statements about intraspecific competition is false?
Exponent competition is a form of intraspecific competition.
Which of the following statements about intraspecific competition is false?
Growth rates of plants are only slightly influenced by intraspecific competition but greatly depressed by the presence of interspecific competition.
Which of the following statements is false?
In response to increased population density, the proportion of females having offspring each year increases
Which of the following statements about population density and stress is false?
Pheromones become unimportant in crowded conditions
Which of the following statements about dispersal is true?
Dispersal aids in the persistence of local populations.
Which of the following statements about social behavior is false?
Social dominance always plays a role in population regulation.
The area that an animal normally uses during its activities is called a
home range
Which of the following statements about population regulation of migratory songbirds is false?
Climate variation causes density-dependent mortality.
Which of the following statements about territories and home ranges is false?
Carnivores have smaller ranges than similar-sized herbivores.
Which of the following statements is false?
Plants are territorial, just like animals
Which of the following regulates population growth?
density-dependent factors
Which of the following statements about density dependence is false?
Density-dependent factors alone cannot limit population growth.
On a graph of population size versus time for a population undergoing logistic growth, the line showing the population's size is
sigmoidal
Which of the following statements about competition is false?
When competition occurs, individuals must directly interact with one another.
The logistic model effectively has two components: the original exponential term (rN) and a second term (1 − N/K). What is the function of the second term in this model?
The term 1 − N/K functions to reduce population growth as the population size approaches the carrying capacity
On a graph of rate of population growth, dN⁄dt versus population size for a population undergoing logistic growth, the curve showing the population's rate of growth is
parabolic.
At K, what is the relationship between b and d?
b = d
J. N. Chatworthy examined the growth of white clover plants grown in pots with varying densities of individuals. The results of his experiments showed
an inverse relationship between growth rate and population density
An area defended by an animal is known as its
territory.