Multiple Choice Quiz


1	Parasites:
		A)	are usually smaller than their host
		B)	can alter competitive interactions
		C)	can in most cases be considered K-selected species
		D)	only a and b are true


2	An apparently simple correlation between lynx and snowshoe hare abundances is now known to involve:
		A)	defensive chemicals in young plant stems
		B)	sunspots
		C)	an absence of other predators in most boreal forests
		D)	a moth that transmits pathogens to the lynx


3	A Lotka-Volterra model for host populations modifies exponential growth patterns by including:
		A)	a ratio of K to r, set by the environment
		B)	negative effects proportional to host population size
		C)	a correction term for body size differences
		D)	none of the above


4	The concept of spatial refuges:
		A)	is excluded from Lotka-Volterra models
		B)	suggests that organisms can persist in small numbers outside of their realized niche
		C)	shows how interplay between biotic and abiotic factors affects distribution
		D)	explains why dispersing mites are able to parasitize Cactoblastis moths


5	Predator satiation appears to be a strategy for:
		A)	cicadas
		B)	eucalpytus trees
		C)	oaks
		D)	all of the above


6	Crayfish:
		A)	were shown to transmit mange to red foxes
		B)	may help control the spread of schistosomiasis to humans
		C)	are poor examples of exploitative species
		D)	all of the above


7	A name most often associated with predator-response curves is:
		A)	Molles
		B)	Grime
		C)	Brown
		D)	Hollings


8	Australia has an especially high diversity of:
		A)	placentals
		B)	cacti
		C)	crayfish
		D)	ants


9	Exploitation is:
		A)	dynamic
		B)	gradational
		C)	complex
		D)	ecologically important
		E)	sometimes size dependent
		F)	an integrative term
		G)	studied under laboratory conditions
		H)	manipulated for human gain
		I)	sometimes intraspecific
		J)	a means of increasing fitness
		K)	amenable to modelling
		L)	observed in the field
		M)	all of the above


10	True or False: The classic, tight correlation of population curves results from lynx being the exclusive predator on snowshoe hares.
		A)	True
		B)	False


11	True or False: Only five years after introduction of the Cactoblastis moth, Opuntia was eliminated from Australian deserts.
		A)	True
		B)	False

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