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Maricopa Community Colleges Rio Salado Community College Biology Question

Maricopa Community Colleges Rio Salado Community College Biology Question

Daniel Kevins

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1 of 20

If a population’s growth rate decreases as the population size approaches carrying capacity, the population’s growth follows a(n) ______ model.

	density-dependent growth
	geometric growth
	logistic growth
	exponential growth

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2 of 20

Which of the following has helped human populations to increase their carrying capacity in their environments?

	Increased disease transmission due to living in dense populations
	improved food production and distribution systems
	natural disasters
	increased demand for clean water

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3 of 20

Lichens are one of the first pioneer species on a newly formed volcanic island in the Pacific Ocean. This is an example of ________.

	competitive exclusion.
	an endemic species.
	primary succession.
	a keystone species.

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4 of 20

Developing nations tend to have higher ______than more highly developed nations.

	ecological footprints
	fertility rates
	life expectancies
	ecological services

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5 of 20

A(n) _______tends to have a greater impact on community structure than their abundance in the community might suggest.

	keystone species
	invasive species
	exotic species
	endemic species

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6 of 20

Which of the following is the best example of secondary succession?

	After plowing a field, the farmer decided to rest the field for the next season. Over the next few weeks, native grasses and wild flowers began growing in the field. Within a couple of months, small shrubs became established.
	A lake steadily becomes shallower and more nutrient-rich over time.
	A retreating glacier leaves behind bare rock, which is then colonized by lichens.
	A 100-year flood recently occurred.

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7 of 20

To determine the density of a rabbit population, you would need to know the population count of the rabbits and ________.

	the size of the habitat that the population lives in.
	the density-dependent limiting factors for that population.
	their carrying capacity.
	population distribution pattern.

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8 of 20

On average, the ecological footprint of an American will be ________the ecological footprint of someone from a developing nation.

	larger than
	not comparable to
	about the same as
	smaller than

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9 of 20

Which of the following may cause mimicry?

	Limited food resources
	Predation
	Increased disease transmission
	Intraspecific competiton

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10 of 20

Opportunistic species typically_________.

	are large bodied.
	experience little intraspecific competition for resources.
	reach sexual maturity slowly.
	follow a type II survivorship curve.

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11 of 20

Competition among individuals of different species is _______ competition.

	exospecific
	extraspecific
	intraspecific
	interspecific

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12 of 20

Which of the following might be studied by an ecosystem ecologist?

	predator-prey interactions between the lynx and snow shoes hares.
	the use of mark-recapture to estimate the number of elk in the Kaibab National Forest of Arizona.
	how the intensity of light impacts the distribution of algae in a stream
	competitive exclusion between two species of fruit flies

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13 of 20

Mutualism has ________on one organism, and ________on the other organism.

	a positive impact; no impact
	a positive impact; positive impact
	a negative impact; negative impact
	a positive impact; negative impact

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14 of 20

Random plot sampling is used to estimate ______, and the estimate will be the most accurate when the population is _______distributed.

	population density; randomly
	population size; uniformly
	population density; uniformly
	population size; randomly

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15 of 20

A broad-based, pyramid-shaped age structure diagram for a human nation indicates that nation should consider ________.

	investing more significantly in childcare and youth education.
	importing additional young workers to continue to generate adequate tax revenues.
	encouraging people to have more children.
	planning additional retirement services for an aging population.

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16 of 20

Which level of ecology studies interactions between populations of different species?

	Ecosystem
	Community
	Organismal
	Population

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17 of 20

A species whose members produce only a few offspring and exhibits a high level of parental care _______.

	is opportunistic.
	will follow a type III survivorship curve.
	will follow a type I survivorship curve.
	will be uniformly distributed.

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18 of 20

Which of the following is the intentional release of a natural enemy to attack a pest population?

	Biological control
	Integrated pest management
	Sustainable resource management
	Coevolution

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19 of 20

In the presence of limiting factors, what shape does a population’s growth curve most closely resemble?

	J
	U
	∩
	S

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20 of 20

Which of the following would be most likely to have density-dependent effects on population growth?

	floods
	temperature
	breeding site availability
	fires

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Daniel Kevins

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