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Worksheets

2nd Quarter Test Review

Total questions: 151

Worksheet time: 2hrs 59mins

Name
Class
Date
1.

A system made up of the living and non-living factors that affect it

a)

ecosystem

b)

community

c)

limiting factors

d)

habitat

2.

includes all the living parts of the ecosystem that exist in the same place at the same time and interact with each other

a)

habitat

b)

population

c)

community

d)

ecosystem

3.

consists of all individuals of one species living together in a given area

a)

ecosystem

b)

population

c)

habitat

d)

biotic factors

4.

All of the living and once living things in an ecosystem

a)

abiotic factors

b)

limiting factors

c)

habitat

d)

biotic factors

5.

all of the non living factors in an ecosystem

a)

biotic factors

b)

limiting factors

c)

habitat

d)

abiotic factors

6.

Things that can restrict the number and different types of organisms an ecosystem can support

a)

community

b)

habtitat

c)

predators

d)

limiting factors

7.

a natural area that provides food, water, shelter, and space for living organisms

a)

habitat

b)

community

c)

ecosystem

d)

population

8.

organisms which hunt, and eat, other organism

a)

prey

b)

predators

c)

limiting factors

d)

hype beasts

9.

organisms, which are hunted and eaten by other organisms

a)

predators

b)

community

c)

prey

d)

limiting factors

10.

What is the major source of energy input for an ecosystem

a)

plants

b)

animals

c)

biotic factors

d)

sunlight

11.

Where energy passes from organism to organism in a linear fashion

a)

food webs

b)

energy pyramid

c)

food chain

d)

decomposers

12.

Traces the transfer of energy among producers, consumers, and decomposers in an ecosystem

a)

food chain

b)

food web

c)

energy pyramid

d)

community

13.

The modeling of energy flow in an ecosystem

a)

food web

b)

food chain

c)

producers

d)

energy pyramid

14.

Why does the amount of energy available at each successive trophic level decrease?

a)

the energy is lost as waste

b)

the energy is given to another ecosystem

c)

the energy is used for metabolism or lost as heat

d)

the energy remains the same

15.

What provides the foundation (1st trophic level) of the energy pyramid

a)

consumer

b)

producers

c)

decomposers

d)

herbivores

16.

organisms that make their own food

a)

producers

b)

herbivores

c)

consumers

d)

decomposers

17.

all animals are categorized as _____________ because they obtain food/energy by eating other organisms

a)

producers

b)

decomposers

c)

carnivores

d)

consumers

18.

consumers that return nutrients to the environment by breaking down the remains of dead plants and animals

a)

producers

b)

consumers

c)

decomposers

d)

carnivores

19.

Which materials are continuously cycled through an ecosystem by process like photosynthesis, respiration, and decomposition

a)

water, phosphorous, carbon dioxide, oxygen

b)

water, carbon dioxide, nitrogen, oxygen

c)

carbon dioxide, water, oxygen, phosphorous, nitrogen

d)

nitrogen, phosphorous, carbon dioxide, oxygen

20.

Uses natural language to describe the characteristics or qualities of objects

a)

inference

b)

quantitative observations

c)

qualitative observations

d)

analysis

21.

Expressed using quantities or numbers

a)

quantitative observations

b)

qualitative observations

c)

inference

d)

analysis

22.

an attempt to explain or interpret observations or to propose the cause of what was observed

a)

qualitative observation

b)

models

c)

quantitative observations

d)

inference

23.

Through the process of ____________ organisms capture the sun's energy and convert carbon dioxide and water into sugar and oxygen.

a)

cellular respiration

b)

decomposition

c)

photosynthesis

d)

chemosynthesis

24.

Using oxygen to break down glucose to release energy and carbon dioxide

a)

cellular (aerobic) respiration

b)

photosynthesis

c)

decomposition

d)

chemosynthesis

25.

the rapid growth of algae caused by the addition of excess nutrients into an aquatic ecosystem from animal waste, products, fertilizers, and the atmosphere

a)

nitrification

b)

eutrophication

c)

photosynthesis

d)

cellular respiration

26.

How does eutrophication cause the death of aquatic organisms

a)

the build up of carbon dioxide in the water

b)

the lack of nitrogen in the water

c)

the lack of carbon dioxide in the water

d)

the lack of oxygen in the water

27.

the levels of biological organization from most simple to complex is

a)

organism, population, community, ecosystem, biome, biosphere

b)

biosphere, biome, ecosystem, community, population, organism

c)

biome, ecosystem, biosphere, community, population, organism

d)

organism, community, population, ecosystem, biome, biosphere

28.

contains several biomes

a)

ecosystems

b)

populations

c)

biosphere

d)

community

29.

examples of limiting factors include

a)

food, habitats, rocks

b)

rocks, sunlight, clouds, preys

c)

food, predators, disease, water

d)

water, nitrogen, phosphorous, carbon dioxide

30.

the conductivity probe measures the amount of

a)

oxygen in the water

b)

carbon dioxide in the water

c)

nitrogen in the water

d)

dissolved solids (ions) in the water

31.

When measuring conductivity what kind of levels worries us?

a)

high levels

b)

sudden change in levels

c)

low levels

d)

consistent levels

32.

Can the conductivity probe tell you which types of ions are present in the water?

a)

yes

b)

no

33.

Which of the following are sources of dissolved solids (ions)?

a)

salt and minerals from rocks

b)

gases that ionize in water

c)

fertilizers

d)

all of the above

34.

how can oxygen be added to the water

a)

photosynthesis and stirring of water

b)

photosynthesis and cellular respiration

c)

cellular respiration and stirring of water

d)

cellular respiration and heating up water

35.

Which temperature of water increases the amount of dissolved oxygen (DO)?

a)

colder water

b)

warmer water

c)

room temperature water

d)

both cold and warm water

36.

Which processes will remove dissolved oxygen (DO) from the water?

a)

photosynthesis and cellular respiration

b)

photosynthesis and decomposition

c)

chemosynthesis and decomposition

d)

cellular respiration and decomposition

37.

The pH probe measures what?

a)

dissolved oxygen (DO)

b)

dissolved oxygen (DO) and carbon dioxide

c)

the relative concentration of H+ and OH- ions in water

d)

conductivity

38.

Water with a pH of 7 has

a)

an equal concentration of H+ and OH- ions

b)

more H+ ions than OH- ions

c)

more OH- ions than H+ ions

39.

Acidic water (pH of less than 7) has

a)

greater concentration of H+ ions than OH- ions

b)

greater concentration of OH- ions than H+ ions

c)

equal concentration of H+ and OH-

40.

Basic water (pH greater than 7) has

a)

greater concentration of H+ ions than OH- ions

b)

greater concentration of OH- ions than H+ ions

c)

equal concentration of H+ and OH-

41.

Which of the following processes decreases pH?

a)

Cellular Respiration and decompostion

b)

cellular respiration and photosynthesis

c)

photosynthesis and decomposition

d)

only cellular respiration

42.

Which of the following processes increases the pH of water?

a)

cellular respiration and decomposition

b)

cellular respiration and photosynthesis

c)

photosynthesis and decomposition

d)

only photosynthesis

43.

Which of the following adds nitrogen compounds to water?

a)

only animal waste

b)

only decomposition

c)

animal waste and decomposition

d)

decomposition and photosynthesis

44.

During the nitrogen cycle, bacteria convert the ammonia from animal wastes into

a)

nitrogen

b)

only nitrates

c)

only nitrites

d)

nitrites and nitrates

45.

Plants absorb the nitrogen they need from the water in which form

a)

only nitrite

b)

only nitrate

c)

both nitrite and nitrate

d)

ammonia

46.

Examples of quantitative changes that we measured in water quality are

a)

color changes, water level, organism growth

b)

DO, pH, nitrite, conductivity

c)

color changes, DO, pH, nitrite

d)

water level, organism growth, nitrite, pH

47.

Examples of qualitative changes we measured are

a)

color changes, water level, organism growth

b)

pH, DO, conductivity, nitrite

c)

water level, organism growth, pH

d)

DO, conductivity, nitrite, water level

48.

What does the following represent:

algae ---> Daphnia ---> fish

a)

food web

b)

food chain

c)

energy pyramid

d)

ecosystem

49.

A simple way to show how energy from food passes from one organism to another in a food chain or food web

a)

energy pyramid

b)

food pyramid

c)

energy square

d)

food square

50.

Why do food chains typically have no more than 4 or 5 links?

a)

the amount of energy at each level decreases by 50%

b)

the amount of energy at each level increases by 50%

c)

the amount of energy at each level decreases by 90%

d)

the amount of energy at each level increases by 90%

51.

Why does the amount of energy at each level of the energy pyramid decrease?

a)

energy is lost as water

b)

energy is lost as heat

c)

energy is gained as water

d)

energy is gained as heat

52.

The Pyramid of Biomass shows

a)

the relative numbers of organisms at each trophic level

b)

the total amount of energy at each trophic level

c)

that the total biomass at each successive trophic level is much less than those below it

d)

that the total biomass at each successive trophic level is much greater than those below it

53.

The Pyramid of Numbers shows

a)

the relative number of organisms at each trophic level

b)

the total amount of energy at each trophic level

c)

that the total biomass at each successive trophic level is much less than those below it

d)

that the total amount of energy increases at each trophic level

54.

What percent of net energy production at a trophic level is passed on to the next level?

a)

90%

b)

50%

c)

30%

d)

10%

55.

What processes reduce the energy transferred between trophic levels?

a)

cellular respiration

b)

growth & reproduction

c)

waste & death

d)

all of the above

56.
When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.
a)
Water
b)
Atmosphere
c)
Sun
d)
Air
57.
Which one of these does not add CO2 to the atmosphere?
a)
cooking with gas
b)
planting trees
c)
burning wood
d)
riding in a bus
58.
Combustion is another word for _______________.
a)
a train
b)
a bus
c)
a dog
d)
burning
59.
What does not produce carbon dioxide?
a)
Photosynthesis
b)
Burning Fossil Fuels
c)
Animal respiration
d)
Plants decaying
60.
In the carbon cycle, producers take in the gas __
a)
carbon dioxide
b)
oxygen
c)
nitrogen
d)
carbon monoxide
61.
oxygen is a gas produced by _ and used by  _ 
a)
plants and animals 
b)
photosynthesis and carbon dioxide 
c)
animals and plants 
d)
carbon dioxide and photosynthesis
62.
Why is the ocean important to the carbon cycle?
a)
It keeps sediment containing carbon underwater for millions of years
b)
The ocean gives out more carbon then it takes in (increases global warming)
c)
The ocean isn't important to the carbon cycle.
63.
How much of the atmosphere is composed of nitrogen gas?
a)
87%
b)
38%
c)
78%
d)
21%
64.
How do plants get the nitrogen they need?
a)
from the air
b)
from the soil or water in which they live
c)
from the Sun
d)
from broken-down rocks
65.
Why do all organisms need nitrogen?
a)
To live and grow 
b)
To build phosphorus
c)
To make oxygen levels grow
d)
To help blood circulate better
66.
Nitrogen fixing bacteria, lives in nodules on the root of a plant called
a)
Broccoli
b)
Legumes
c)
Beats
d)
Carrots
67.
The swelling on the roots of a soybean are called
a)
Noodles
b)
Nitrogen
c)
Nodules
d)
Legumes
68.
What converts some atmospheric nitrogen into nitrates that organisms can use?
a)
Sun
b)
Rain
c)
Thunder
d)
Lighting
69.
Which of the following describes the role of nitrogen-fixing bacteria in the nitrogen cycle? Nitrogen-fixing bacteria convert
a)
nitrates intro nitrogen gas
b)
ammonia into proteins
c)
nitrogen gas into ammonia
d)
proteins into nitrates
70.
Animals obtain the nitrogen they need directly from the
a)
soil in their habitat
b)
air they breathe
c)
plants they eat
d)
bacteria living within them
71.
A particular golf course is using large amounts of nitrogen fertilizer. What process could move this nitrogen into a local stream?
a)
volatilization
b)
nitrogen fixation
c)
runoff
d)
ammonification
72.
What converts nitrogen into a useable form for plants and animals?
a)
bacteria
b)
fungi
c)
rain
73.
After plants and animals contain nitrogen, what puts it back into atmosphere and soil?
a)
decomposition
b)
precipitation
c)
condensation
d)
bacteria
74.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
75.
Which is the opposite of condensation?
a)
runoff
b)
evaporation
c)
precipitation
d)
transpiration
76.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
77.
When water _________, dew forms.
a)
Melts
b)
Evaporates
c)
Condenses
d)
Precipitates
78.
Which of the following organisms is a herbivore.
a)
butterfly
b)
snake
c)
fox
d)
ladybird
79.
Which of the following organisms is a carnivore.
a)
greenfly
b)
titmouse
c)
mouse
d)
buzzard
80.
The owl receives energy from which organisms?
a)
grasshopper and mouse
b)
mouse and rabbit
c)
rabbit and butterfly
d)
butterfly and frog
81.
Which organism is the top predator in this food web?
a)
leopard seal
b)
killer whale
c)
elephant seal
d)
crabeater seal
82.
Name the producers in this food web.
a)
seagull and fish
b)
penguin and crab
c)
phytoplankton and seaweed
d)
seaweed and zooplankton
83.
In the energy pyramid here, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
84.
In the energy pyramid below, which organism has the least amount of energy available?
a)
Producers
b)
Herbivores
c)
Carnivores
d)
Top Predator
85.
If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?
a)
10 Kcal
b)
1 Kcal
c)
100 Kcal
d)
1000 Kcal
86.
What would happen to the snake population if the hawks all died suddenly?
a)
The snake population would decrease 
b)
The snake population would increase
c)
The mouse population would increase 
d)
The grass population would decrease
87.
What would happen if I came through with a helicopter and dropped a million rabbits in this ecosystem?
a)
Hawk population would decrease
b)
Grass population would increase 
c)
Grass population would decrease
d)
Snake population would decrease
88.
Which animal is the 2nd level consumer?
a)
Snake
b)
Rabbit
c)
Wildflowers
d)
Mouse
89.
Which animal can be a 2nd level consumer or a 3rd level consumer?
a)
Snake
b)
Mouse
c)
Rabbit
d)
Hawk
90.
Changes in an organisms environment that cause a response
a)
Tropism
b)
Hormone
c)
Stimuli
d)
Response
91.
Which of the following responses is a plant growing toward or leaning toward light?
a)
thigmotropism
b)
hydrotropism
c)
phototropism
d)
gravitropism
92.
What causes animals to hibernate? 
a)
very cold air temperatures 
b)
lack of food
c)
a need to survive
d)
all of the above 
93.
Instead of hibernating, some animals _______ to warmer places. 
a)
survive
b)
sleep
c)
burrow
d)
migrate
94.
A period of a plant when is does NOT grow
a)
spore
b)
stamen
c)
nutrient
d)
dormancy
95.
Adaptation that increases the survival rate of seeds in harsh environments. 
a)
Radicle
b)
Day Neutral Plant
c)
Intermediate Day Plant
d)
Dormancy
96.
Thermal pollution can result when...
a)
DO levels decrease
b)
A factory dumps cooling water directly into a lake
c)
Nitrate levels peak
d)
Turbidity decreases
97.
What effect can increased turbidity have on water temperature?
a)
Decreases temperature by blocking light.
b)
Decreases temperature by stimulating algal growth.
c)
Increases temperature  when the particles absorb sunlight
d)
There is no relationship between turbidity and temperature.
98.
Which of the following choices contains two factors that can increase dissolved oxygen (DO)?
a)
Increased photosynthesis and decreased water velocity.
b)
Increased wave action and increased decomposer activity.
c)
Decreased decomposer activity and increaed  photosynthesis.
d)
Increased cellular respiration and increaed temperature.
99.
A solution with a pH 6 has _____ x the concentration of hydrogen ions as a solution with pH 7.
a)
1
b)
10
c)
100
d)
1000
100.
How do decomposers influence the pH of a lake?
a)
By producing oxygen , which raises pH.
b)
By trapping detritus, which lowers pH.
c)
By producing humus, which increases water holding capacity.
d)
By producing CO2 which decreases pH.
101.
What effect does increased water acidity have on heavy metals in the water?
a)
Decreased pH traps metals at the bottom of lakes.
b)
Increased pH decomposes metals.
c)
Decreased pH mobilizes metals from sediment into the water.
d)
Decreased pH causes metals to become explosive.
102.
What is turbidity a measure of?
a)
Photosynthesis in water.
b)
Change in biological activity.
c)
Cloudiness of water.
d)
Solubility of atmospheric gases in water.
103.
Which of the following includes correct units of measurement for turbidity?
a)
Phograms and parsecs.
b)
Feet-of-visibility and  NTU
c)
mg/L and JTU
d)
ppm and colonies/100mL
104.
Which of the following can directly increase water turbidity?
a)
Decreased temperature and sewage dumping
b)
Algae growth and increased pH.
c)
Increased soil erosion and algae growth.
d)
Fertilizer runoff and increased DO.
105.
What is one impact of increaesd turbidity?
a)
Greater rate of temperature change across a continuum.
b)
Decreased water temperatures.
c)
Increased flagellation of facultative anaerobes.
d)
Lower productivity beneath the surface of the water.
106.
Which choice contains correct items that can increase nitrate or phosphate levels in a lake?
a)
Fecal coliform and sewage
b)
Sewage and acid rain
c)
Increased algae growth and thermal pollution
d)
Fertilizers and laundry detergents
107.
Where is the benthic region of a lake?
a)
The top
b)
The middle
c)
The bottom
d)
The shoreline
108.
Which of the following are examples of benthic macroinvertebrates?
a)
Fish eggs and bacteria
b)
Fungus and fish
c)
Insect larva and worms
d)
Jellyfish and crayfish
109.
How do benthic macroinvertebrates indicate water quality?
a)
If pollution-intolerant organisms are found, quality is good.
b)
If pollution-intolerant organisms not found, water is poor.
c)
If pollution-tolerant organisms are found, quality is good.
d)
If any of these are found, water is of poor quality.
110.

Which of these bodies of water would most likely have the highest dissolved oxygen content?

a)
b)
c)
d)
111.

Salting sidewalks and roads to melt ice in the winter would lead to an increase in aquatic...

a)

phosphates

b)

temperature

c)

total dissolved solids (TDS)

d)

biochemical oxygen demand (BOD)

112.

How can an algal bloom (eutrophication) lead to a decrease in dissolved oxygen?

a)

Algae is a heterotroph and consumes more oxygen than it produces.

b)

Decreased light penetration limits photosynthesis below the surface.

c)

Bacteria produce oxygen as they compose dead algae and other organisms.

d)

Decomposers that would have produced oxygen are outcompeted by algae.

113.
What does biodiversity mean?
a)
Only one species in an area.
b)
The different amount of species in an area
c)
All abiotic life
d)
Nitrogen fixation
114.

Why is it important to have high biodiversity in an ecosystem?

a)

Decrease the chance an ecosystem can survive human activities/natural disasters

b)

increase the chance an ecosystem can survive human activities/natural disasters

c)

to increase the population of omnivores

d)

to decrease the population of omnivores

115.
A wetland is like a sieve because it
a)
filters water
b)
absorbs water
c)
provides habitat
116.
A land area that is covered with water for part of the year is called:
a)
Lake
b)
Wetland
c)
River
117.
What is the order of succession shown in this figure?
a)
A, B, C, D
b)
B, A, D, C
c)
C, D, A, B
d)
D, A, B, C
118.
What type of succession is shown going from figure A to figure B?
a)
primary succession
b)
ecological succession
c)
secondary succession
d)
intermediate
119.
What is the goal of the pioneer species in Primary Succession?
a)
To kill the dead materials after a disaster
b)
To rebuild soil
c)
To feed Johnny
d)
To put fresh oxygen into the air
120.
The picture shows what type of succession?
a)
primary
b)
secondary
c)
tertiary
d)
quadanary
121.
What is the name given to lichen or algae after a primary succession?
a)
pioneer species
b)
volunteer species
c)
founder species
d)
conqueror species
122.
After a volcanic eruption, lava covers the land. What is the order that plants grow to repopulate the area?
a)
Lichens → Shrubs → Grasses → Trees
b)
Lichens → tree → shrubs→Grasses
c)
Grasses → Lichens → Shrubs → Trees
d)
Lichens → Grasses → Shrubs → Trees
123.
the process by which a new community forms where no community lived before 
a)
resource
b)
invasive (non- native) species
c)
primary succession
d)
competition
124.
What is the correct order from oldest (happened first) to youngest (happened last) in this pond succession?
a)
A, B, C, D
b)
D, C, B, A
c)
B, A, D, C
d)
C, D, A, B
125.
Reaches a climax community quicker because soil is already present
a)
primary succession 
b)
secondary succession
c)
both types of succession
126.
Final illustration (#8) shows
a)
pioneer species
b)
climax community
c)
only biotic factors
d)
only abiotic factors
127.
A pioneer species is...
a)
a large organism
b)
the first organisms to adapt to a new environment 
c)
The best organism 
d)
Abiotic organisms 
128.
What is the most important function of pioneer species?
a)
To create rocks
b)
To create soil and add nutrients to the environment 
c)
To look nice
d)
Food for animals 
129.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
130.
Which organisms perform Photosynthesis?
a)
Only Autotrophs
b)
Only Heterotrophs
c)
Autotrophs and Heterotrophs
131.
What is the pigment in chloroplasts that performs photosynthesis?
a)
Chlorosynthesis
b)
Chlorophyll
c)
ADP
d)
Electron Transport
132.
Which gas is removed from the atmosphere during photosynthesis?
a)
hydrogen
b)
oxygen
c)
nitrogen
d)
carbon dioxide
133.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
134.
What is photosynthesis?
a)
The process in which humans eat their food
b)
When a photographer takes a photo.
c)
To get your pictures from the photo lab.
d)
The process in which plants make their food.
135.
What is photosynthesis?
a)
The process in which humans eat their food
b)
When a photographer takes a photo.
c)
To get your pictures from the photo lab.
d)
The process in which plants make their food.
136.
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
137.
Leaves look green because.....
a)
they eat their vegetables
b)
to blend into their environment
c)
they contain a molecule named chlorophyll
d)
they are sick
138.
Which organelle from the plant cell is primarily responsible for converting sunlight to energy?
a)
Mitochonria
b)
Nucleus
c)
Vacuole
d)
Chloroplast
139.
A relationship between two organisms in which one organism benefits and the other is unharmed...
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
140.
A tapeworm and a cat have this type of relationship.
a)
mutualism
b)
parasitism
c)
commensalism
d)
competition
141.
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
142.
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
143.
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
144.
A relationship between two organisms in which both organisms benefit. 
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
145.
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
146.
An organism that is killed and eaten by another organism
a)
Predator
b)
Prey
c)
Competition
d)
Adaptation
147.
A consumer that hunts is called:
a)
a producer.
b)
an omnivore.
c)
a predator.
d)
a herbivore.
148.

In Predator/Prey Graphs what happens to Predator numbers if Prey numbers increase.

a)

The predator numbers INCREASE

b)

The predator numbers DECREASE

149.

In Predator/Prey Graphs what happens to Predator numbers if Prey numbers decrease.

a)

The predator numbers INCREASE

b)

The predator numbers DECREASE

150.

In Predator/Prey Graphs what happens to Prey numbers if Predator numbers decrease.

a)

The prey numbers INCREASE

b)

The prey numbers DECREASE

151.

In Predator/Prey Graphs what happens to Prey numbers if Predator numbers increase.

a)

The prey numbers INCREASE

b)

The prey numbers DECREASE

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