Its a multi choice question

Its a multi choice question

Thank you for reading this post, don't forget to subscribe!

Open Quick Links

Quick Links

Page Landmarks

Content Outline

Keyboard Shortcuts


Global Menu

Oluwafunke GbadamosiActivity UpdatesExpand Global Nav



Prince George`s Community College eLearning

Top Frame Tabs

My eLearning Tab 1 of 8 My Courses Tab 2 of 8 (active tab) eOrganizations Tab 3 of 8 Online/Student Services Tab 4 of 8 Tech Support Tab 5 of 8 PGCC Blackboard Tab 6 of 8 Orientation Tab 7 of 8 eLearning Tab 8 of 8

Current Location

Help is On: Click to hide page help.

2019FA-BIO-1010-DL05 General Biology (BIO-1010-DL05) ONLINE

Course-to-Course Navigation

Course Content

Unit 1 Study Help

Take Test: Unit I Practice Exam

Hide Course Menu

PGCC Website

Menu Management Options


Display Course Menu in a Window

Course Menu:

2019FA-BIO-1010-DL05 General Biology (BIO-1010-DL05) ONLINE

Course Entry Page


Start Here

Syllabus & Schedule

Course Content

Discussion Board

Faculty Info



Discussion Board

My Groups

Cooperative Activity 1

Group Homepage: Cooperative Activity 1


Take Test: Unit I Practice Exam


Top of Form

Assistive Technology Tips [opens in new window]

Test Information


Description This is a practice exam for unit 1. It will give you practice with taking the exams online. You may take the exam as many times as you wish, but it will not count for a grade.
Multiple Attempts This test allows multiple attempts.
Force Completion This test can be saved and resumed later.

ExpandQuestion Completion Status:

1Question Incomplete2Question Incomplete3Question Incomplete4Question Incomplete5Question Incomplete6Question Incomplete7Question Incomplete8Question Incomplete9Question Incomplete10Question Incomplete11Question Incomplete12Question Incomplete13Question Incomplete14Question Incomplete15Question Incomplete16Question Incomplete17Question Incomplete18Question Incomplete19Question Incomplete20Question Incomplete21Question Incomplete22Question Incomplete23Question Incomplete24Question Incomplete25Question Incomplete26Question Incomplete27Question Incomplete28Question Incomplete29Question Incomplete30Question Incomplete31Question Incomplete32Question Incomplete33Question Incomplete34Question Incomplete35Question Incomplete36Question Incomplete37Question Incomplete38Question Incomplete39Question Incomplete40Question Incomplete41Question Incomplete42Question Incomplete43Question Incomplete44Question Incomplete45Question Incomplete46Question Incomplete47Question Incomplete48Question Incomplete49Question Incomplete50Question Incomplete

Question 1


How would Earth change if the greenhouse effect didn’t exist at all?

Without the greenhouse effect, Earth would radiate all its heat into space.
All the incoming sunlight energy would be absorbed without the greenhouse effect.
The result of no greenhouse effect would be an extremely hot planet that never cools down.
Animals and plants would survive comfortably, and the average temperature would never change if the greenhouse effect did not exist.

2 points

Question 2


How do scientists “know” the atmospheric levels of carbon dioxide that existed on Earth hundreds or thousands of years ago?

They deduce it from the carbon dioxide content of fossil fuels.
They measure it from bubbles of gas trapped in Antarctic ice.
They estimate it from the relative numbers of carbon-based life forms that existed over time.
They measure it from erupting volcanoes, bubbling hot springs, and seeping hydrothermal vents.

2 points

Question 3


Burning fossil fuels can result in

a decrease in ground-level ozone levels.
a decrease in carbon dioxide levels.
an increase in mercury levels.
a decrease in acid rain.

2 points

Question 4


Developed countries are characterized by

industrial economies and low individual incomes.
agricultural economies and high individual incomes.
agricultural economies and low individual incomes.
industrial economies and high individual incomes.

2 points

Question 5


How does the greenhouse effect work?

Rocks, soil, and water on Earth’s surface absorb sunlight energy and radiate it as heat.
The energy from sunlight passes through the transparent water of the oceans and heats up the Earth’s core.
Some sunlight energy that hits Earth radiates toward space, but some is trapped by atmospheric gases.
All the sunlight energy striking Earth bounces off the planet and radiates into space.

2 points

Question 6


Which of the following experiments would not be considered an ecological study?

the effect of a housing development on a spotted salamander population in a vernal pool
the effect of changing availability of acorns on a population of squirrels
the effect of a red tide outbreak on sea birds in the area
the effect of a hormone on the rate of blood vessel formation

2 points

Question 7


Growth rates appear to be declining in many human populations because

families are choosing to have fewer children.
death rates are increasing due to disease epidemics and famines.
birth rates are decreasing due to famine.
the carrying capacity has been reached.

2 points

Question 8


A population has reached the carrying capacity of the environment when

the environment can’t support a further increase in the population.
the environment can’t support the current population.
it has entered an extended period of exponential growth.
the food supply in that particular environment begins to decrease.

2 points

Question 9


Americans make up less than ________ of the total human population, yet use close to ________ of the world’s resources.

1%; 50%
5%; 25%
0.1%; 75%
0.01%; 80%

2 points

Question 10


Which of the following projects would be conducted by an ecologist?

a research project testing new pollution filters for cars
a study of squirrels and their interactions with other animals
observations of toad embryos’ development in a Petri dish
a project to genetically modify a wheat plant in order to increase production

2 points

Question 11


Which of the following can be considered a predator?

wood warbler
honey bee

2 points

Question 12


Which of the following has dramatically decreased infant mortality in human populations?

a shift from an agricultural to an industrial economy
the use of pesticides to reduce mosquito populations
the choice made by educated women to have fewer children
an increase in poverty in developed countries

2 points

Question 13


Over the past two centuries, the growth of human population has

leveled off slowly.
increased steadily.
exhibited “boom and bust” growth.
increased exponentially.

2 points

Question 14


Which of the following is the proper equation for photosynthesis?

6CO2 + 6O2 + sunlight  C6H12O6 + 6H2O
6H2O + 6CO2 + sunlight  C6H12O6 + 6O2
C6H12O6 + 6O2 + sunlight  6CO2 + 6H2O
O2 + H2O + sunlight  C6H12O6 + CO2

2 points

Question 15


According to the graph, by how many parts per million has the concentration of atmospheric carbon dioxide changed between 1980 and 2010?

about 20 ppm
about 50 ppm
about 80 ppm
about 110 ppm

2 points

Question 16


Which of the following is a density-dependent factor?

decrease in temperature
increase in waste production
decrease in frequency of hurricanes
increase in rainfall

2 points

Question 17


The process of photosynthesis transforms solar energy into ________ energy.


2 points

Question 18


Approximately how many people are on Earth today?


2 points

Question 19


Exponential growth, when graphed, appears as a(n)

straight line.
“S” curve.
“J” curve.
wavy line that goes up and down regularly.

2 points

Question 20


What can happen to the carbon dioxide in the atmosphere?

It can be released into space from the atmosphere.
It can be converted to glucose by plants.
It can be converted into carbon monoxide by the oceans.
It can react with nitrogen to form fossil fuels.

2 points

Question 21


A decrease in the amount of greenhouse gases in Earth’s atmosphere would result in

cooler average global temperatures.
warmer average global temperatures.
no change in average global temperatures.
cooler temperatures in the northern hemisphere and warmer temperatures in the southern hemisphere.

2 points

Question 22


The role a species plays in an ecosystem is called its

trophic level.

2 points

Question 23


Which of the following is represented by a completely “columnar” population pyramid?

proportionally more young than middle-aged or elderly
equal proportions of young, middle-aged, and elderly
proportionally more middle-aged and elderly than young
proportionally more middle-aged than elderly and/or young

2 points

Question 24


Which of these would be the most likely effect on precipitation from global warming?

an increase in the months of snowfall in higher latitudes
a decrease in the amount of snowfall on mountaintops
an increase in the amount of rainfall in every climate
a decrease in the amount of rainfall near oceans

2 points

Question 25


According to this plot, growth rate and doubling time are

directly proportional.
inversely proportional.
not related to one another.
equally proportional to one another.

2 points

Question 26


Energy in ecosystems:

a. cycles from the sun to plants, then to animals, then back to the sun
b. cycles from the sun to animals, then to decomposers
c. travels only one way from the sun, to plants, then to animals
d. increases as you pass from one trophic level to the next higher level
e. is returned from decomposers to the soil, where it can be picked up by plants

2 points

Question 27


A(n)  ________ could exert the most influence to speed the reduction of greenhouse gas emissions.

business owner
nonprofit corporation
policy maker

2 points

Question 28


All individuals of all species living within an area of interest represent a(n)

trophic level.

2 points

Question 29


According to scientists, how do the levels of carbon dioxide in the atmosphere today compare to the past 400,000 years?

There’s more atmospheric carbon dioxide today.
There’s less atmospheric carbon dioxide today.
There have been no changes in atmospheric carbon dioxide levels.
Atmospheric carbon dioxide levels have fluctuated randomly.

2 points

Question 30


Which of the following would most likely result in a population represented by an “inverted triangular” population pyramid, which is heaviest at the top?

rapid population growth
population stabilization
a “boom and bust” cycle
a population decline

2 points

Question 31


What are fossil fuels?

carbon-rich remains of plants and microorganisms
underground deposits of carbon dioxide
accumulations of partially decomposed dinosaurs
timber from old-growth forests

2 points

Question 32


Human populations may surpass the carrying capacity of their environment due to

temporary reliance on stored or nonrenewable resources.
sudden population crashes.
increases in death rates as the population growth approaches carrying capacity.
decreases in birth rates as resources are depleted.

2 points

Question 33


As the size of a population approaches the carrying capacity of its environment, which of following is true?

the growth rate increases
a graph of population growth resembles a “J”
the population stabilizes at its maximum size
birth rates become proportionally much greater than the death rates

2 points

Question 34


Most of the energy contained in one trophic level is “lost” when it gets to the next trophic level. The lost energy takes the form of

free electrons.
metabolic heat.
potential energy, in chemical bonds.
kinetic energy, in the motion of consumers.

2 points

Question 35


The greenhouse effect is most similar to

heating up the air inside a car by parking it in the sun.
warming the air for a hot-air balloon with a propane burner.
burning kerosene in a heater to warm up the air inside a cold house.
growing plants in your office to reduce indoor air pollution.

2 points

Question 36


The carrying capacity of a population is represented as


2 points

Question 37


When a population of spotted salamanders in an area of vernal pools remains stable for many years and the population has stabilized because of resource limits, then

density dependence is not involved.
predation has decreased.
carrying capacity has been reached.
density independence occurs.

2 points

Question 38


Which of the following is a nonrenewable resource?

solar energy
hydrogen fuel cell
wind power
natural gas

2 points

Question 39


Which of the following is a population-limiting, density-dependent factor?

a heavy flood that destroys a large area around a river
a heat wave in which some organisms can’t survive
a drought that limits food availability
the rapid spread of tuberculosis in heavily populated areas

2 points

Question 40


Which of these human activities has directly contributed to global warming?

burning of coal
building of greenhouses
planting of trees
development of solar energy

2 points

Question 41


A food chain in the open ocean, from the base up, would be

zooplankton, phytoplankton, tuna, cod.
phytoplankton, zooplankton, sand lance, humpback.
shark, cod, phytoplankton, zooplankton.
albatross, cod, zooplankton, phytoplankton.

2 points

Question 42


The plants that made up fossil fuels lived around ________ years ago.


2 points

Question 43


Which of these activities could help you to slow the rate of global warming?

only buy food in plastic containers
drive faster than the speed limit
replace an old refrigerator with a new one
mow the grass more frequently

2 points

Question 44


Based on the population pyramid of the United States in 2010, as seen in this figure, you can predict that the population will

be in a demographic transition.
experience a decrease.
experience a decrease after a period of high demographic momentum.
remain relatively stable due to low demographic momentum.

2 points

Question 45


True or false: Nearly all developed countries in the world are beginning a demographic transition in the 21st century.



2 points

Question 46


True or false: Scientists agree on the size of the carrying capacity of Earth for the human population.



2 points

Question 47


True or false: The human population may continue to increase even though it surpasses carrying capacity.



2 points

Question 48


True or false: In general, developed countries have lower population growth rates than less developed countries.



2 points

Question 49


True or false: Most developed countries have passed through a demographic transition and currently have low population growth rates.



2 points

Question 50


True or false: The average American uses as many resources in one day as 370 Ethiopians.



2 points

Save and Submit

Click Save and Submit to save and submit. Click Save All Answers to save all answers.

Bottom of Form



ave and Submit











Get a 5 % discount on an order above $ 20
Use the following coupon code :