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Biology Laboratory Manual, 6/e

Darrell S. Vodopich, Baylor University
Randy Moore, University of Minnesota--Minneapolis

Exercise 19 - Ecology

Choose the one answer that best answers the question.


1	What is a quadrant?
		A)	a randomly determined area
		B)	a line
		C)	a description that does not use numbers
		D)	the interaction among individuals seeking a common resource that is scarce


2	The line-intercept method of assessing plant communities measures the distance from randomly chosen points to from a ____ to the nearest plant.
		A)	plot
		B)	quadrant
		C)	transect
		D)	allelopathy


3	Using a transect of 10 m, an ecologist found 157 individuals of a species of bluebonnet. According to her measurements, what is the density of bluebonnets?
		A)	1570 bluebonnets per meter
		B)	15.7 bluebonnets per meter
		C)	1570 bluebonnets per m2
		D)	0.06


4	Using a transect of 10 m, an ecologist found 427 individuals of plants, 157 of which were bluebonnets. According to her measurements, what is the relative density of bluebonnets?
		A)	15.7 bluebonnets per meter
		B)	1570 bluebonnets per meter
		C)	0.37
		D)	2.71


5	Basically, what does the frequency of a plant tell us?
		A)	the number of individuals that are in the community
		B)	the importance of the species to the community
		C)	the amount of area the species covers in the community
		D)	the number of times the species is encountered in the community


6	What is competition?
		A)	The inhibition of a plant's germination or growth by exposure to compounds produced by another plant.
		B)	The interaction among individuals seeking a common resource that is scarce.
		C)	The amount of area a species covers in a community.
		D)	The sum of the relative density, relative coverage, and relative frequency of a given species for a community.


7	What type of competition exists between members of the same species?
		A)	interspecific
		B)	intraspecific
		C)	allelopathic
		D)	relative importance


8	Which of the following would be a resource in which one would expect to see only intraspecific competition?
		A)	light
		B)	water
		C)	mates
		D)	nutrient


9	What is the inhibition of a plant's germination or growth by exposure to compounds produced by another plant?
		A)	intraspecific competition
		B)	allelopathy
		C)	importance
		D)	quadrant


10	Using a transect of 100 m, an ecologist found a species of live oak to have a total intercept length of 67 m. What is the coverage of live oaks in the community?
		A)	6700 m2
		B)	6700 m
		C)	0.67 m
		D)	0.67

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