Name _____________________________________Date___________________Period_____________

Unit 1: Practice Exam and Review

1.1: Organization and Characteristics of Life

1. Which of the following is the correct order for the organization of life?

a. Ecosystems → communities → populations → organisms → organs → organ systems → tissues → cells

b. Cells → tissues → organs → organisms → organ systems → populations → communities → ecosystems

c. Ecosystems → communities → populations → organisms → organs → organ systems → cells → tissues

d. Cells → tissues → organs → organ systems → organisms → populations → communities → ecosystems

2. Which of the following is an example of a community?

a. b. c. d.

3. Emily is looking at a picture of deer. All the deer together make a _______________.

a. population

b. organism

c. ecosystem

d. community

4. Which of the following is an abiotic component of a desert in California?

a. cacti

b. windmills

c. dead scorpion

d. horned lizard

5. Every species has a role that it plays in nature. That role is defined by a combination of the organism's behaviors,

habitat, and interaction with other species. For example, a garden spider is a predator that hunts for prey among plants,

while an oak tree grows to dominate a forest canopy, turning sunlight into food. The oak tree provides the food and

protection in the canopy. This is its _____________.

a. species

b. habitat

c. ecosystem

d. niche

6. Last year you caught the flu during flu season. Flu season is coming up again and your doctor recommends you get the

new flu shot. Why does your doctor recommend this?

a. Because the flu is strong.

b. Because the flu is a virus made up of DNA.

c. Because the flu can make you sick.

d. Because the flu virus has adapted and changed from the strain last year.

7. What is commonly known as the smallest abiotic unit?

8. What is commonly known as the smallest biotic unit?

9. Compare and contrast a niche and a habitat.

1.2 Energy Flow through Ecosystems Quiz

1) Which of following organisms are decomposers?

a) Fungi and Worms b) Coyotes and Foxes

c) Robins and Vultures d) Venus Fly Traps and Orchids

2) Which organism is an herbivore in the diagram above?

a) Grasses b) Rabbit c) Snake d) Mouse

3) Which organism is an autotroph in the diagram above?

a) Grasses b) Rabbit c) Snake d) Mouse

4) Which organism is an omnivore in the diagram above?

a) Grasses b) Rabbit c) Snake d) Mouse

5) A Heterotroph is and organism that

a) obtains energy by consuming other organisms.

b) obtains energy by consuming plants.

c) obtains energy by hunting other animals.

d) obtains energy by converting sunlight, water and carbon dioxide into sugars.

6) Another word for a producer is

a) consumer b) autotroph c) user d) heterotroph

7) 90% of the energy in each trophic level is lost from the food web in which form(s)?

a) Heat from burning calories

b) Bones, feathers and fur

c) Stored fat

d) Both a and b

A group of students conduct field research at school by counting the number of organisms in 12, 1x1 meter plots

around the schoolyard. Their hypothesis was; If we count the number of organisms in the school’s habitat, then we

expect there to be more producers than consumers. Their data is as follows :

Number of Different

Species

Total number observed

Plants 8 1285

Birds 2 7

Mammals 1 1

Reptiles and Amphibians 1 4

Insects and spiders 3 873

Total in schoolyard 15 2170

8) What should the students’ conclusion be?

a) They should accept their hypothesis because there were less plants.

b) They should reject their hypothesis because there are more plants.

c) They should accept their hypothesis because they counted more producers than consumers.

d) They should reject their hypothesis because they probably counted wrong.

9) Which level contains herbivores?

a) producers b) primary consumers c) secondary consumers d) tertiary consumers

10) If the rabbits have 2000 kcal of energy, how much will be lost and unavailable to the snake?

a) 9000 kcal b) 180 kcal c) 200 kcal d) 1800 kca

11) If plants produce 20,000 kcal of energy, how much is passed on to the hawks?

a) 2 kcal b) 180 kcal c) 200 kcal d) 20 kcal

1.3 Ecological Relationships

1. The chinstrap penguin is a species of penguin which inhabits a variety of islands

and shores in the Southern Pacific and the Antarctic Ocean. The shore can be a

dangerous place with the waves crushing along the sides of the island. The

penguins must face the harsh waters when they dive in, in search of fish. The

waves are an example of what kind of environmental factor?

a. Biotic

b. Abiotic

c. Symbiosis

d. Competition

2. Everything on the islands has to compete for space and food. The male Pygmy

three-toed sloth searches for a mate by responding to her calls and swimming

towards her. Other male Pygmy three-toed sloths also hear the call, and will

compete to be the first to reach the potential mate. This is an example of:

a. Mutualism

b. Commensalism

c. Intraspecific Competition

d. Interspecific Competition

3. The iguanas help other animals on the island to survive by bringing nutrients

from the sea to the land. Crabs feed on the dead skin and nutrients on the

iguanas’ back, and in turn, provide a welcome exfoliation service. Both

organisms benefit from this relationship. This is an example of what kind of

relationship?

a. Mutualism

b. Commensalism

c. Invasive Species

d. Parasitism

4. The yellow crazy ants on Christmas Island were brought on ships and

invaded the island. They are not native to Christmas Island. They attack

crabs, squirting acid into their eyes and mouths as they try to defend

the territory that they both compete for. Which of the following terms

best describes this example?

a. Mutualism

b. Commensalism

c. Interspecific competition

d. Intraspecific competition

5. Fairy terns live on islands and use the trees on the island to nest with their

eggs. Rather than constructing a nest, they use trees that have a cavity or gap

in which they can put their egg in. The fairy terns benefit from the tree, but

the trees are not affected from the birds. Which of the following terms best

describes this example?

a. Mutualism

b. Commensalism

c. Invasive Species

d. Parasitism

6. Mistletoe is a plant that attaches itself to a tree or shrub by a structure

called a haustorium, which it uses to extract water and nutrients from the

tree or shrub. Which of the following best describes this example?

a. Mutualism

b. Commensalism

c. Invasive Species

d. Parasitism

7. When a small number of wolves were reintroduced to Yellowstone National Park, they preyed upon the deer

population. This reduction in deer population allowed many plants to grow back, which allowed many mice,

weasels, snakes, and songbirds to move back into the park. The wolves were small in number, but had an

enormous impact on the environment to help increase biodiversity. Wolves in Yellowstone National Park

are an example of a

a. Pioneer species

b. Succession species

c. Keystone species

d. Climax community

8. Which of the following graphs would be a population undergoing exponential growth that has no limiting

factors controlling the population’s size?

9. Which of the following graphs would be a population reaching its carrying capacity?

a. b. c. d.

a. b. c. d.

Mistletoe growing on a host

tree.

10. Which of the following is an example of a limiting factor on a population?

a. Food Supply

b. Mates

c. Space

d. all of the above

Please use the following graph for questions 11-12.

11. During days 11 - 15, which of the following statements is true?

a. The population is decreasing in size

b. The birth rate is greater than the death rate

c. The emigration rate (how many leave) is much higher than the immigration rate (how many come)

d. The population increases, but at a very slow rate

12. What is the carrying capacity of Species 5?

a. 500

b. 1000

c. 1500

d. 2000

13. Based on the graph, which of the following is a possible explanation for day 23 – 35?

a. An equal number of deaths and births

b. An unequal number of deaths and births

c. An equal number of immigrants and births

d. An equal number of emigrants and deaths

Use the following data table to answer the question below.

Year Sea-Going Iguana Population Racer Snake Population

2001 200 320

2002 220 500

2003 520 120

2004 830 100

2005 640 130

2006 680 360

2007 630 150

2008 150 120

2009 360 60

2010 900 80

2011 780 650

2012 400 300

14. Which of the following best represents the data between the predator and the prey in the table above?

15. An invasive species

a. lives in an area it is native to.

b. does not interact with the other organisms in the ecosystem.

c. causes problems to the organisms and environment which it inhabits.

d. Is an example of overexploitation.

a. b.

c. d.

16. While hamsters are thought to be only domesticated pet animals, the wild

hamster was discovered in Syria in 1797. During a 1930 expedition, zoologist

Israel Aharoni captured a golden hamster and brought it back to Hebrew

University. From there the hamsters quickly multiplied and soon found

themselves in universities, zoos, and eventually homes. When in the

university lab, Aharoni noticed that the hamster populations would

only grow to 16 in its enclosure. Space was a

____________________. If they were relocated to a larger space, the

population would grow more than 15. Howev, 12 hamsters from both

the large and smaller enclosure dies one night. Aharoni suspects that their water source

was contaminated. This is a ____________________.

a. carrying capacity / random factor

b. density independent factors / density dependent factor

c. density dependent factor / density independent factors

d. random factor/ carrying capacity

17. Elephants are illegally poached (hunted) for their ivory tusks. This is an example of:

a. invasive species

b. pollution

c. habitat destruction

d. overexploitation

1.4 Biogeochemical Cycles

1. Which of the following is an example is a renewable resource?

a. Oil

b. Coal

c. Natural gas

d. Solar energy

2. Which of the following is not a renewable resource?

a. Oil

b. Solar

c. Dams

d. Windmills

3. The diagram represents a cross section of the shoreline of Lake Erie. What process returns

water from the atmosphere to the lake?

a. precipitation

b. condensation

c. infiltration

d. evaporation

4. Which of the following processes is responsible for changing liquid water into water vapor?

a. Photosynthesis

b. Condensation

c. Evaporation

d. Precipitation

5. In the image, what process does #2 represent?

a. Photosynthesis

b. Condensation

c. Precipitation

d. Transpiration

6. When it rains, water can runoff into streams, rivers, lakes, and oceans. In some

places, the sediment is porous and absorbs water. This water then collects

underground. This is called

a. groundlake

b. seepage

c. surface water

d. limestone

7. What is the name of the process in which water vapors cool to form liquid held in clouds?

a. Precipitation

b. Condensation

c. Evaporation

d. Transpiration

8. Which of the following would lead to a decrease in carbon dioxide gas in the atmosphere?

a. Deforestation

b. Burning fossil fuels

c. Increase in human population

d. Increase in plant population

9. The diagram shows the gas exchange among different organisms. Which

compound does X represent?

a. Carbon dioxide

b. Water

c. Oxygen

d. Methane

10. The dissolved carbon dioxide in a lake is used directly by

a. autotrophs.

b. parasites.

c. fungi.

d. Decomposers.

11. Tropical rain forests remove carbon dioxide gas from Earth’s atmosphere. The

destruction of the rain forests could affect Earth’s overall average temperature because

a. more of Earth’s re-radiation would be absorbed by the atmosphere.

b. more sunlight would be reflected back to space by Earth’s atmosphere.

c. more visible light would be absorbed by Earth’s atmosphere.

d. more ultraviolet light would be transmitted through Earth’s atmosphere.

12. Which of the following is not a greenhouse gas and is not a good absorber of infrared radiation?

a. Oxygen

b. Methane

c. Carbon dioxide

d. Nitrous oxide

13. Which of the following is not a reason why the current

atmospheric levels of CO2 is so high?

a. Increase in manufacturing using fossil fuels since the

industrial revolution

b. Increase in new technologies like electric cars

c. Deforestation for space

d. Increase in factory farming of animals

Bonus: Describe each of the characteristics that all living things have in common below.

Characteristic that all living organisms have in common

Description

Made of one of more cells

Contains DNA

Maintains Homeostasis

Reproduces

Grows and Develops

Responds to stimuli

Requires energy