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7th Grade Semester 2 Final Review

Total questions: 129

Worksheet time: 2hrs 56mins

Name
Class
Date
1.

An ecosystem is made up of all the ___________ and _____________ factors in an area.

a)

not/without

b)

Limiting Factor/ Carrying Capacity

c)

Biotic/Abiotic

d)

life/ biotic factor

2.

Living or once-living organisms in an ecosystem are called ___________.

a)

abiotic factors

b)

biotic factors

c)

non-living

d)

life

3.

Nonliving elements in an ecosystem are called _______________.

a)

biotic factors

b)

abiotic factors

c)

limiting factors

d)

carrying capacity

4.
Bio means _________.
a)
non-living
b)
not/without
c)
life
d)
living
5.
Is a deer an abiotic or biotic factor? 
a)
abiotic
b)
biotic
6.

Is dirt an abiotic or biotic factor?

a)

abioitic

b)

biotic

7.
Is a mushroom an abiotic or biotic factor? 
a)
abiotic
b)
biotic
8.

Is weather an abiotic or biotic factor?

a)

abiotic

b)

biotic

9.

Put the levels of organization in an ecosystem in order from the LARGEST to the SMALLEST.

a)

population, organism, community

b)

organism, community, population

c)

community, population, organism

d)

community, organism, population

10.
TRUE or FALSE: A community includes all abiotic and biotic factors.
a)
TRUE
b)

FALSE

11.

Which of the following is the most simple level of ecological organization?

a)

A community

b)

Organisms

c)

A population

d)

An ecosystem

12.

What level of organization can be seen here? (a cluster of sea urchins)

a)
Species
b)
Population
c)
Community
d)
Ecosystem
13.
TRUE or FALSE: An ecosystem contains only biotic factors.
a)
TRUE
b)
FALSE
14.
What level of organization can be observed in the image?
a)
Species
b)
Population
c)
Community
d)
Ecosystem
15.
The study of organisms and how they interact with one another and their environment is best described as
a)
Biology
b)
Ecology
c)
Zoology
d)
Botany
16.

A place where an organism lives.

a)

Their Terrain

b)

Their Habitat

c)

Their Community

d)

Their Population

17.
A collection of organisms that belong to different populations but all live in the same area and interact with one another.
a)
Population
b)
Ecosystem
c)
Community
d)
Ecosphere
18.
What are the biotic factors in this image?
a)
sunlight, elephants, and grasses
b)
sunlight, water,  and air
c)
elephants, plants, trees 
19.
Which of the following best describes a community?
a)
sharks, groupers, anemones and shrimp on a coral reef
b)
decorator crabs on the seafloor
c)
loggerhead sea turtles in Atlantic
d)
prairie grassland in Wyoming
20.

Light Energy -> Producer -> Consumer -> Second Level Consumer -> Top Consumer -> Decomposer.

This is an example of a...

a)

Food Web

b)

Food Chain

c)

Level of Organization

d)

Food Pyramid

21.

What happens to energy as different levels of organisms consume each other?

a)

100% of the energy is passed to consumer

b)

50% of the energy is passed to consumer

c)

10% of the energy is passed to the consumer

d)

0% of the energy is passed to the consumer

22.

Why are "Top Consumers" called by this special name?

a)

They get the most energy from whatever they consume.

b)

They get to eat their meal last.

c)

They can feed on anything.

d)

Nothing actively hunts them as a food source.

23.

TRUE of FALSE: You can not have a Food Web without a Food Chain.

a)

TRUE

b)

FALSE

24.

The percentage of Energy that is lost as you move up the Energy Pyramid is lost how?

a)

The climate in which the organisms exist in is too cold.

b)

Everyday activities such as breathing and eating spend the energy in the form of heat.

c)

The higher level consumer doesn't eat the entire organism.

25.

If 200,000 calories are available at the Producer (bottom) level of a given Energy Pyramid, how many calories will be available for the Secondary (2 levels up from bottom) Level Consumer?

a)

100,000

b)

20,000

c)

2,000

d)

2,000,000

26.

From the bottom of the Marianas Trench to the top of our breathable atmosphere would be considered what level of organization

a)

ecosystem

b)

community

c)

population

d)

biosphere

27.

Energy from the Sun is given to ___________________ so that they can make their own food.

a)

Producers

b)

Consumers

c)

Decomposers

28.

These organisms can be herbivores, omnivores, or carnivores.

a)

producers

b)

energy input

c)

consumers

d)

reducers

29.

If we are talking about the cycling of matter, the correct order of biotic and abiotic factors would be...

a)

energy source, producer, primary consumer, top consumer, decomposer

b)

producer, decomposer, energy source, consumer

c)

primary consumer, producer, top consumer, energy source, decomposer

d)

energy source, nutrients, decomposer, consumer, producer

30.

How many levels of organization are there on Planet Earth?

a)

4

b)

3

c)

6

d)

5

31.

When viewing Food Webs, the arrows show what?

a)

The flow of energy to the organism doing the eating.

b)

The flow of energy to the organism being eaten.

c)

The way to follow the food web.

d)

Which organism will be eaten next.

32.

In this food web, what does the owl eat?

a)

grasshopper, bird

b)

frog, mouse

c)

mouse, rabbit

d)

grass, frog

33.

List a top level consumer from the food web...

a)

Deer

b)

Snake

c)

Hawk

d)

Bees

34.

How many producers are there in the food web?

a)

3

b)

2

c)

4

d)

1

35.
Which symbols best describe commensalism?
a)
+,+
b)
+,-
c)
+,0
d)
0,0
36.
Barnacles create home sites by attaching themselves to whales. This neither harms nor benefits the whales.
a)
Mutualsim 
b)
Parasitism 
c)
Commensalism 
37.
Mistletoe extracts water and nutrients from the spruce tree to the tree's detriment (harm). 
a)
Mutualsim 
b)
Parasitism 
c)
Commensalism 
38.
Yucca flowers are pollinated by yucca moths. The moths lay their eggs  in the flowers where  the larvae hatch and eat some of the developing seeds. Both species benefit.  
a)
Mutualism 
b)
Parasitism 
c)
Commensalism 
39.
A snake is eaten by a hawk. The hawk is the _______.
a)
prey
b)
parasite
c)
predator
d)
all of these
40.
A frog eats a fly. The frog and fly are demonstrating ________.
a)
mutualism
b)
competition
c)
predator/prey
d)
parasitism
41.
Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not.
a)
mutualism
b)
commensalism
c)
competition
d)
parasitism
42.
A relationship between two organisms in which one organism benefits and the other is unharmed...
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
43.
A tapeworm and a cat have this type of relationship.
a)
mutualism
b)
parasitism
c)
commensalism
d)
competition
44.
What type of symbiosis?  Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower.
a)
commensalism
b)
mutualism
c)
parasitism
d)
predation
45.
What type of symbiosis?  Skunks often live in burrows that have been dug and abandoned by woodchucks.  
a)
commensalism
b)
mutualism
c)
parasitism
d)
predation
46.
Which symbols best describe parasitism?
a)
+,+
b)
+,-
c)
+,0
d)
-,0
47.
Red-billed oxpeckers are birds that often feed on parasites that infest impala.  This is an example of _______.
a)
commensalism
b)
mutualism
c)
neutralism
d)
competition
48.
A relationship between two organisms in which both organisms benefit. 
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
49.
When a mosquito bites you, you are the __________ and the mosquito is the  ____________.
a)
host, hostess
b)
parasite, host
c)
host, parasite
d)
prey, predator
50.

Aphids are tiny insects that live on and eat the leaves of plants, removing vital nutrients from the plants.

a)

Predation

b)

Parasitism

c)

Commensalism

d)

Mutualism

51.
Which of the following shows the symbiotic relationship between the Rodent and the Bird?  
a)
Mutualism
b)
Predation
c)
Competition
d)
Commensalism
52.
Honey guide birds alert and direct badgers to bee hives.  The badgers then expose the hives and feed on the honey first.  Then the honey guide birds eat.  
a)
mutualism
b)
commensalism
c)
predation
d)
competition
53.
Remoras attach themselves to a shark's body. They then travel with the shak and feed on the left over scraps from the shark's meals.
a)
commensalism
b)
mutualism
c)
predation
d)
competition
54.
Hermit Crabs live in shells made and then abandoned by snails.  
a)
Commensalism
b)
Mutualism
c)
Competition
d)
Parasitism
55.
Ostriches and Gazelles feed next to each other.  They both watch for predators and alert each other to danger.  Since the visual abilities of the two species are different, they can each identify threats the other animal would not as readily see.  
a)
Parasitism
b)
Commensalism
c)
 Mutualism 
d)
Competition.  
56.
Oxpeckers feed on the ticks found on a Rhinoceros.  
a)
Mutualism
b)
Predation
c)
Competition
d)
Parasitism
57.
Two male elephants are fighting over a cute little elephant at the watering hole.  
a)
Commensalism
b)
Competition
c)
Predation
d)
Mutualism
58.
Two male Giraffes are fighting over the last green leaf of a tree that is dying.  
a)
Competition
b)
Mutualsim
c)
Predation
d)
Commensalism
59.

In many ecosystem relationships two organisms will complete for resources. What best defines a "resource"?

a)

A tool used to find facts on the interwebs.

b)

Something found in an area that provides materials necessary for growth and the maintenance of life.

c)

Material that is NOT able to be used by organisms for their benefit.

60.

An environmental factor that is very important in determining the size of a species population is also known as a...?

a)

limiting factor

b)

determining factor

c)

resource depletion

d)

human impact

61.

An example of a limiting factor would be...

a)

the amount of sunlight in an open field

b)

the amount of air in the sky

c)

the amount of fresh drinking water in an area

d)

the amount of sand grains on a beach

62.

Carrying Capacity is best defined as...?

a)

the most of something an ecosystem can carry before falling over

b)

the smallest population number an ecosystem can support

c)

the average population number an ecosystem can support

d)

the largest population number an ecosystem can support

63.

Based on the graph, which population began to rise first AFTER 1 month?

a)

rabbit

b)

snake

c)

hawk

d)

grass

64.

Based on the graph, how long did it take for grass to rebound and hit its highest population percentage?

a)

1 month

b)

3 months

c)

12 months

d)

6 months

65.

Which relationship is this an example of?

a)

mutualism

b)

commensalism

c)

predation

d)

parasitism

66.

Which relationship is this an example of?

a)

competition

b)

predation

c)

commensalism

d)

parasitism

67.

Which relationship is this an example of?

a)

competition

b)

predation

c)

mutualism

d)

commensalism

68.

A producer is something that:

a)

Eats plants

b)

Makes its own food

c)

Eats animals

d)

Eats plants and animals

69.

Producers are always at the __________ of a food chain

a)

Beginning

b)

Middle

c)

End

d)

Producers are not part of the food chain

70.

Consumers...

a)

Make their own food

b)

Go through photosynthesis

c)

Eat other organisms

d)

Breathe in carbon dioxide

71.

Which of these things is NOT a consumer

a)

Human

b)

Whale

c)

Tree

d)

Chicken

72.

What do the arrows show in this food chain:


plant → grasshopper → bird → snake → owl.

a)

The arrow points from the organism being eaten to the organism that eats it.

b)

The arrow points from the organism that eats it to the organism that is being eaten.

c)

The arrow points from biggest animal to smallest animal.

d)

The arrow points from the consumers to the producers.

73.

What is the producer in this food chain?


phytoplankton → krill → fish → shark

a)

Phytoplankton

b)

Krill

c)

Fish

d)

Shark

74.

As you move through a food chain, the amount of energy stored....

a)

Increases

b)

Decreases

c)

Stays the same

d)

It depends on the ecosystem

75.

How much energy does trophic level 2 store from trophic level 1? (and so on..)

a)

1%

b)

10%

c)

50%

d)

100%

76.

Arrows in a food web show the flow of

a)

energy

b)

protein

c)

nutrients

d)

glucose

77.

Multiple food chains that interact together is called a ....

a)

Spider Web

b)

Food Spider

c)

Food Web

d)

Web of Food

78.

What do decomposers eat?

a)

Dead things

b)

Living things

79.

Mushroom (Fungus)

a)

Decomposer

b)

Producer

c)

Consumer

80.

Trees

a)

Decomposers

b)

Consumers

c)

Producers

81.

Falcon

a)

Decomposer

b)

Consumer

c)

Producer

82.

Cactus

a)

Abiotic

b)

Biotic

83.

What are the two REACTANTS in photosynthesis?

a)

Carbon dioxide and oxygen

b)

Water and sunlight

c)

Water and carbon dioxide

d)

Glucose and sunlight

84.

What are the PRODUCTS in photosynthesis?

a)

Sunlight and water

b)

Carbon dioxide and water

c)

Glucose and carbon dioxide

d)

Glucose and oxygen

85.

What does an ecosystem NEED to survive?

a)

Sunlight

b)

Oxygen

c)

Carbon Dioxide

d)

All of the above

86.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
87.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
88.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
89.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
90.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
91.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
92.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
93.
In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?
a)
Tall = T
Short = S
b)
Tall = T
Short = t
c)
Tall = t
Short = T
d)
Tall = TT
Short = tt
94.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
95.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

96.

What is the genotypic ratio of the offspring?

a)

3:1

b)

1:3

c)

1:2:1

d)

2:2

97.

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

a)

50 % Brown fur and 50% White fur

b)

25 % Brown fur and 75% White fur

c)

75 % Brown fur and 25% White fur

d)

0% Brown fur and 100% White fur

98.
What are the possible genotypes for this cross?
(Click the picture to see it without the text)
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
99.
If you cross a black guinea pig with a white guinea pig and the offspring are gray, what type of dominant trait would that be.
a)
incomplete dominance
b)
codominance
c)
codependant
d)
cooperative
100.

B=Brown fur

b=tan fur

What percent of the offspring would be tan when you cross BbxBb?

a)

75%

b)

25%

c)

50%

d)

100%

101.
In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has brown fur, what can you conclude about its genotype?
a)
It is BB.
b)
It is Bb
c)
It is brown
d)
It is bb.
102.
This punnett square shows a cross between
a)
A hybrid Parent and a Homozygous parent
b)
A heterozygous parent and a heterozygous parent
c)
Two homozygous parents
d)
Two Hybrid Parents
103.
This is an example of
a)

Complete dominance

b)

Mendelian Genetics

c)

Codominance

d)

Incomplete Dominance

104.
 One dog carries homozygous, long-haired traits (SS), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair.
a)
100%
b)
75%
c)
50%
d)
25%
105.
Why are there no white rabbit babies?
a)
The white gene is not present in any of the babies.
b)
It takes two recessive genes to show the trait.
c)
Grey is a better color.
d)
Baby five will be white.
106.
Which organelle performs PHOTOSYNTHESIS?
a)
Chloroplast
b)
Mitochondria
107.

Which of the following is the correct equation for PHOTOSYNTHESIS?

a)

carbon dioxide + light energy + water --> oxygen + glucose

b)

carbon dioxide + glucose + water --> oxygen + light energy

c)

oxygen + light energy+ water --> carbon dioxide + glucose

d)

carbon dioxide + oxygen + water --> light energy + glucose

108.

What process occurs when light energy is captured in producers and converted into sugar?

a)

Photosynthesis

b)

Cellular Respiration

109.
What is the ultimate ORIGINAL source of energy for living things
a)
Sugar
b)
Sun
c)
Moon
d)
Carbon Dioxide
110.

Which organisms perform PHOTOSYNTHESIS?

a)

Only producers

b)

Only consumers

c)

Producers and Consumers

111.

Which of the following is an example of an PRODUCER?

a)

Appletree

b)

Dog

c)

Mushroom

d)

Human

112.

What is the pigment in chloroplasts that performs PHOTOSYNTHESIS?

a)

Chlorosynthesis

b)

Chlorophyll

c)

ADP

d)

Electron Transport

113.

Which gas is removed from the atmosphere during PHOTOSYNTHESIS?

a)

hydrogen

b)

oxygen

c)

nitrogen

d)

carbon dioxide

114.

What are the products of PHOTOSYNTHESIS?

a)

water and carbon dioxide

b)

oxygen and glucose

c)

oxygen and carbon dioxide

d)

oxygen and water

115.
Chloroplasts are...
a)
Structures of animal cells to produce ATP
b)
Organelles where lipids are elaborated
c)
Specialized structures of plants where food is made
d)
Waste organelle of plants
116.
What is produced as a result of photosynthesis?
a)
Glucose and Chlorophyll
b)
Glucose and Oxygen
c)
Water and Light energy
d)
Carbon dioxide and Water
117.

If all four plants were watered daily but placed in a closet, receiving no sunlight, what process would NOT occur?

a)

Cellular respiration

b)

Filtration of water through the soil

c)

Photosynthesis

d)

Water absorbtion

118.

CELLULAR RESPIRATION is the process by which

a)

plant cells create glucose

b)

cells use oxygen to produce energy from food

c)

cells grow and reproduce

d)

cells breakdown food without using oxygen

119.

PHOTOSYNTHESIS allows

a)

an animal cell to get energy from food.

b)

a plant to produce food (glucose).

c)

a cell to produce energy without oxygen.

d)

a plant leaf to turn green.

120.

PHOTOSYNTHESIS is the process by which

a)

plant cells create glucose

b)

cells use oxygen to produce energy

c)

cells grow and reproduce

d)

cells breakdown food without using energy

121.

Why would plants be better able to survive in a world without animals than animals in a world without plants?

a)

animals only make oxygen for plants, so animals are not needed

b)

plants already produce glucose necessary for photosynthesis to take place

c)

plants produce their own carbon dioxide and water in cellular respiration

d)

animals do not produce anything plants need to survive

122.

The energy molecule made in CELLULAR RESPIRATION is called

a)

DNA

b)

ATP

c)

glucose

d)

oxygen

123.

Which of the following is the correct equation for CELLULAR RESPIRATION?

a)

glucose + oxygen + water --> carbon dioxide + ATP

b)

water + carbon dioxide + ATP --> glucose + oxygen

c)

carbon dioxide + ATP --> glucose + oxygen + water

d)

glucose + oxygen --> water + carbon dioxide + ATP

124.

Which organelle performs CELLULAR RESPIRATION?

a)

Chloroplast

b)

Mitochondria

125.

The purpose of CELLULAR RESPIRATION is to

a)

make glucose

b)

capture the energy in sunlight

c)

breakdown glucose into energy

d)

change carbon dioxide

126.

How are PHOTOSYNTHESIS and CELLULAR RESPIRATION related?

a)

They have opposite equations

b)

They have the same equation

c)

They both produce carbon dioxide

d)

They both produce oxygen

127.

What are the reactants of CELLULAR RESPIRATION?

a)

water and carbon dioxide

b)

oxygen and glucose

c)

oxygen and carbon dioxide

d)

oxygen and water

128.

What are the products of CELLULAR RESPIRATION?

a)

water, carbon dioxide, and ATP

b)

oxygen and glucose

c)

oxygen and carbon dioxide

d)

oxygen and water

129.

What are the reactants of PHOTOSYNTHESIS?

a)

water, carbon dioxide, and light energy

b)

oxygen and glucose

c)

oxygen and carbon dioxide

d)

oxygen and water

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