Question

1.)The logistic equation assumes that

A. the per capita growth rate is a constant.

B.	the per capita growth rate declines with increasing density.

C.	populations will increase in size indefinitely.

D.	Both a and c

E.	None of the above

2. Which of the following would not be an example of density-dependent factors regulating population size?

A. The number of possible territories for robins is limited; thus when population sizes are high, a lower proportion of individuals can produce offspring.

B.	In conditions of overcrowding, some desert pupfish living in ponds will emigrate to other ponds if given the opportunity.

C. In conditions of high density, mice are more susceptible to mortality from heat stress.

D.	Predation on mosquitofish is high, regardless of population size.

E.	All of the above are examples of density-dependent factors regulating population size.

3.) Which of the following statements is false?

A. The distribution of a species is the geographic area where individuals of that species are present.

B. The distribution of a species is a map of all areas where the abundance of the species is greater than zero.

C.	Populations are dynamic entities that vary in size over time and space.

D.	A population is a group of individuals from the same species that interact with one another within a particular area.

E.	All of the above are true; none is false.

4.) Which of the following statements about populations is false?

A.	If little is known about the distance that sexually reproducing organisms or their gametes move, the area that constitutes a single population is difficult to estimate.

B.	Population abundances change over time and space.

C.	A population may consist of a series of patches of individuals that are isolated in space but are connected by dispersal.

D.	Most organisms have similar capacities for dispersal.

E.	All of the above are true; none is false.