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[answered] A biologicalcommunity is the portion of the Earth's su


A biologicalcommunity

is the portion of the Earth's surface where living things exist.
is one species and its immediate environment.
is one species without regard to its environment.
consists of all the various populations in a particular area.
involves the interactions of organisms with one another and their physical environment.


Flag this QuestionQuestion 22.5pts A bird's nest in a tree is an example of ___________.

mutualism
commensalism
parasitism
predation
an ecological niche


Flag this QuestionQuestion 32.5pts Akeystone species?is a particular species in a community that competes with all other species in that community for nutrients.

True.
False.


Flag this QuestionQuestion 42.5pts A rabbit eating grass is an example of a predator eating prey.

True
False


Flag this QuestionQuestion 52.5pts All of the organic nutrients made by producers are utilized by consumers.

True.
False.


Flag this QuestionQuestion 62.5pts Anexotic speciesis defined as a species that is

illegal to sell.
a poor competitor for nutrients.
a hybrid.
indigenous to an area.
non-native to a particular community.


Flag this QuestionQuestion 72.5pts An organism which produces many offspring has a much lower biotic potential.

True
False


Flag this QuestionQuestion 82.5pts Compared to the LDCs, the MDCs account for 90% of the hazardous waste production on the planet.

True.
False.


Flag this QuestionQuestion 92.5pts In a particular area where the annual death rate is 35 per 1000 individuals and the annual birth rate is 15, population growth would be

-20%
0%
2%
-2%
20%


Flag this QuestionQuestion 102.5pts In a population of locusts, there are 5,000 individuals and the per capita rate of increase is 10% per month. How many locusts will there be after 3 months?

5,500
6,000
6,050
6,500
6,655


Flag this QuestionQuestion 112.5pts Ocean water off the coast of Africa would release more carbon dioxide into the atmosphere than ocean water off the coast of Antarctica.

True
False


Flag this QuestionQuestion 122.5pts Photoautotrophs using carbon dioxide from the atmosphere for their own needs is an example of a reservoir.

True
False


Flag this QuestionQuestion 132.5pts Replacement reproduction (each couple producing only two children) always leads to zero population growth.

True.
False.


Flag this QuestionQuestion 142.5pts Theage structureof a population is used to determine the impact of the population on resource consumption.

True.
False.


Flag this QuestionQuestion 152.5pts The amount of a nutrient that moves from one component of the environment to another within a specified period of time is called the

eutrophication.
recovery cycle.
transfer rate.
trophism.
food web.


Flag this QuestionQuestion 162.5pts Thecarrying capacityis constant within any defined geographical location.

True.
False.


Flag this QuestionQuestion 172.5pts Thecompetitive exclusion principlestates that

all species compete with all others in any defined community.
"survival of the fittest" is the prevailing phenomenon in any niche.
no two species can occupy the same niche at the same time.
all species limit the populations of all other species in a community.
as species evolve, they become more competitive.


Flag this QuestionQuestion 182.5pts The environmental impact (E.I.) of a population is a function of population size and

resource consumption.
geographic distribution.
mean age of the population.
populations of other species in the area.
availability of water.


Flag this QuestionQuestion 192.5pts The first species to appear in an area undergoing either primary or secondary succession is called theopportunistic pioneer species.

True.
False.


Flag this QuestionQuestion 202.5pts The growth of equilibrium populations is regulated by density-dependent effects.

True.
False.


Flag this QuestionQuestion 212.5pts The human population of the MDCs as a whole

has always had a low growth rate.
has had a death rate exceeding the birth rate since 1950.
has grown modestly since 1950.
has grown exponentially since 1950.
is expected to increase by 5 billion by 2050.


Flag this QuestionQuestion 222.5pts The majority of humans live in ___________.

North America
South America
Africa
Asia
Europe


Flag this QuestionQuestion 232.5pts The process of evolutionary change in one species causing evolutionary change in another species is calledparallelism.

True.
False.


Flag this QuestionQuestion 242.5pts The process whereby nitrogen gas from the atmosphere is converted into ammonium is callednitrogen fixation.

True.
False.


Flag this QuestionQuestion 252.5pts The term ______________ is used to describe the various species and the relative abundance of each in a community.

diversity
ecosystem
species richness
biosphere
coexistence


Flag this QuestionQuestion 262.5pts Which of the following are producers?

carnivores
herbivores
omnivores
heterotrophs
autotrophs


Flag this QuestionQuestion 272.5pts Which of the following biomes has the higher primary productivity?

temperate grassland
desert
temperate deciduous forest
coral reef
sandy beach


Flag this QuestionQuestion 282.5pts Which of the following is a density-dependent factor in the regulation of population growth?

predation
flooding
annual rainfall
mean temperature of the area
earthquake


Flag this QuestionQuestion 292.5pts Which of the following is a requirement for secondary succession to occur?

a climax community
human activity
soil
natural disasters
rain


Flag this QuestionQuestion 302.5pts Which of the following is an incorrect association regarding interactions within communities?

habitat?area of community where a particular species lives
parasitism?one species obtains nutrients from another
mutualism?relationship benefits both species
commensalism?one species benefits and one species is harmed by the relationship
predation?one species feeds on another


Flag this QuestionQuestion 312.5pts Which of the following is an incorrect association?

trophic level--level of nourishment within a food chain
sedimentary cycle--chemical absorbed from soil and eventually returned to soil
food chain?-a diagram showing a single path of energy flow in an ecosystem
ecological pyramid--energy gain between trophic levels
grazing food web--begins with plants


Flag this QuestionQuestion 322.5pts Which of the following is an incorrect match?

carrying capacity--number of individuals resources can support
stable equilibrium phase--birth and death rates equal
exponential growth phase--growth accelerating
lag phase--small number of individuals in population
deceleration phase--growth is declining


Flag this QuestionQuestion 332.5pts Which of the following is an incorrect statement?

Decomposers are plants that live on dead organic matter.
Autotrophs are called producers because they produce food.
Herbivores eat algae or plant material.
Detritus includes both living and non-living material.
Chemoautotrophs obtain energy from inorganic compounds.


Flag this QuestionQuestion 342.5pts Which of the following is characteristic of an opportunistic population?

The individuals are large in size.
The individuals have long life span.
The individuals are small in size.
The population exhibits logistic growth.
The population size is close to the carrying capacity.


Flag this QuestionQuestion 352.5pts Which of the following is not considered when determining the biotic potential of a population?

the age at which reproduction begins
the chances of survival until reproductive age
the age at which reproduction ends
the frequency of reproduction per individual
the number of offspring per reproduction


Flag this QuestionQuestion 362.5pts Which of the following is the correct order of biological organization from largest to smallest?

community -ecosystem -biosphere -population -organism
organism -population -community -ecosystem -biosphere
ecosystem -biosphere -population--community organism
biosphere -population -community -ecosystem organism
biosphere -ecosystem -community -population organism


Flag this QuestionQuestion 372.5pts Which of the following statements is not true?

Resources?include both living and nonliving components of an environment.
Population density varies with the availability of resources.
A?range?is a geographical area where only one species is found.
Clumped, random, and uniform are three ways to describe spatial distribution of individuals within a population.
Population density declines with increasing body size.


Flag this QuestionQuestion 382.5pts Which of the following would not be a biologicalcommunity?

the human body
a fallen log
a coral reef
an aquarium
all organisms in North America


Flag this QuestionQuestion 392.5pts Which statement is true regarding the LDCs?

The death rate exceeds the birth rate.
The birth rate and death rate are approximately equal.
Diseases are expected to play no part in population changes over the next half-century.
The major population change is expected to occur in Latin America.
The birth rate exceeds the death rate.


Flag this QuestionQuestion 402.5pts Which two factors define the biomes?

the producers and the consumers
temperature and rainfall
grazing and detrital food webs
biogeochemical cycles and food webs

available sunlight and biomass


1. Involves the interactions of organisms with one another and their physical environment.

 

2. commensalism

 

3. false

 

4. false

 

5. True.

 

6. non?native to a particular community.

 

7. False

 

8. True

 

9....

 


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