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Ecology

Total questions: 44

Worksheet time: 25mins

Name
Class
Date
1.
All living things get their energy from which of the following sources?
a)
food
b)
water
c)
sun
2.
Which of the following is another word for a plant?
a)
autotroph
b)
heterotroph
c)
consumer
3.
Which of the following terms describes an area where an organism lives?
a)
community
b)
habitat
c)
area
4.
Which is represented by all of the bullfrogs living around a pond?
a)
community
b)
habitat
c)
population
5.
What would most likely happen if the rabbit population was removed from the food chain grass —› rabbit —› fox?
a)
their would be more grass
b)

there would be more energy

c)
there would be more fox
6.
Which is an example of a parasitic relationship?
a)
a bee pollinates a flower
b)
a tapeworm takes nutrients from a dog
c)
an orchid lives in a tree but does not harm the tree
7.
In which type of relationship do both species benefit?
a)
parasitism
b)
mutualism
c)
commensalism
8.
An oxpecker bird eats ticks off of a zebra.  The bird gets food from eating the ticks and the zebra has harmful parasites removed.  Which type of symbiosis is this?
a)
mutualism
b)
parasitism
c)
commensalism
9.
Barnacles grow on whales.  Whales give the barnacles a place to live but the barnacles do not help or harm the whale.  Which type of relationship is this?
a)
commensalism
b)
mutualism
c)
parasitiesm
10.

In the woods, there are ducks and mice. They both compete for grasshoppers as the only source of food in that area at that time. The ducks outcompete the mice, and the mice die out in that area. This is an example of:

a)

Neutralism

b)

Commensalism

c)

The competitive exclusion principle

d)

Mutualism

11.

In this photo, what is an abiotic factor?

a)

Deer

b)

Grass

c)

rain

12.

What would be a good example of a primary consumer?

a)

carnivore

b)

detrivore

c)

decomposer

d)

herbivore

13.

Which organisms would be at the top or last trophic level?

a)

plant

b)

herbivore

c)

omnivore

d)

carnivore

14.

The monkey would be a

a)

decomposer

b)

producer

c)

primary consumer

d)

secondary consumer

15.

90% of the energy that gets lost as you move up a food pyramid or chain gets lost as

a)

pollution to the environment

b)

heat to the environment

c)

energy for decomposers

d)

gets recycled

16.

What percentage of energy is passed on to the next trophic level?

a)

5%

b)

10%

c)

50%

d)

90%

17.
The process of plants losing water through their leaves is called ____.
a)
condensation
b)
evaporation
c)
transpiration
d)
exhaling
18.
What is the only process that removes carbon from the atmosphere?
a)
combustion
b)
cellular respiration
c)
photosynthesis
d)
decomposition
19.
What converts nitrogen into a useable form for plants and animals?
a)
bacteria
b)
fungi
c)
rain
20.
Which nutrient is not cycled through the atmosphere?
a)
carbon
b)
nitrogen
c)
phosphorous
d)
water
21.
All food webs and food chains begin with _________________.
a)
primary consumer
b)
producers
c)
secondary consumers
d)
predators
22.
For a pyramid of numbers, the width of the bar shows the__________ of organisms present in each trophic level at a particular time. 
a)
number
b)
biomass
c)
energy
d)
volume
23.
Which of the following shows the correct pyramid of biomass for the food chain?
a)
A
b)
B
24.
The number of organisms _________ with each successive (higher) trophic level. 
a)
increases
b)
decreases
25.

Which contribute to a positive population growth?

a)

immigration

b)

positive birth rate

c)

emigration

d)

positive death rate

26.

Which of the following describes the population of elephants in Kenya from 1973-1989?

a)

(immigration + births) – (emigration + deaths) = 0

b)

(immigration + births) – (emigration + deaths) = 1

c)

(immigration + births) – (emigration + deaths) < 0

d)

(immigration + births) – (emigration + deaths) > 0

27.

A population’s emigration in one month totaled 2 individuals. During the same period, immigration was 12 individuals. Natality (births) was 8, and mortality was 15 due to a parasite infection. What was the net effect on the population size?

a)

+5

b)

+3

c)

0

d)

-4

28.

What type of factor has an increasing impact as the population size increases?

a)

density-independent

b)

density-dependent

c)

cohort effect

d)

survivorship factor

29.

Which of the following are density dependent factors?

a)

competition for resources

b)

predation

c)

disease

d)

natural disasters

30.

Which of the following are examples of a density independent factors?

a)

forest fire

b)

seasonal cycles

c)

storms

d)

disease

31.

Factors like predation can have a positive benefit to the population of prey organisms because predators tend to keep prey populations below their ___________.

a)

carrying capacity

b)

sustainibility number

c)

exponential growth point

d)

competition level

32.

What type of growth model is shown in image A?

a)

Exponential

b)

Logistic

33.

What type of growth model is shown in image B?

a)

Exponential

b)

Logistic

34.

What point on the graph represents carrying capacity?

a)

a

b)

b

c)

c

d)

d

35.

Which choice most closely approximates the deer population's carrying capacity based on the graph?

a)

100

b)

80

c)

60

d)

10

36.
Food, water, sunlight, shelter, and space are resources that are often __________.
a)
limiting factors
b)
wet
c)
messy
d)
found in rocks
37.
In a forest ecosystem, which of the following is the best example of a limiting factor for a rabbit population?
a)
Squirrel Population
b)
Sunlight
c)
Grass available
38.
A population is...
a)
A group of one species in one area
b)
Multiple species that live in one area
c)
All of the living and nonliving things in an area
d)
None of these
39.

This graph shows ....

a)

When one population increases, the other decreases.

b)

When one population decreases, the other increases.

c)

When one population increases, the other increases instantly.

d)

When one population increases, it causes the other to increases shortly after.

40.

Define population density and distribution.

a)

The average number of people in a given unit area and how a population is spread over an area.

b)

The number of houses per square kilometre and urbanisation rates.

c)

Where people live on the surface of the earth.

d)

The number of a people in a country and where they are situated.

41.

Which of the following is NOT a challenge to a growing population?

a)

Overcrowding

b)

Housing shortages

c)

Overuse of resources

d)

Increased food supplies

42.

Calculate the density of the human population in the pictured habitat.

a)

30 humans360 ft2\frac{30\ humans}{360\ ft^2}  

b)

50 humans360 ft2\frac{50\ humans}{360\ ft^2}  

c)

30 humans38 ft2\frac{30\ humans}{38\ ft^2}  

d)

50 humans38 ft2\frac{50\ humans}{38\ ft^2}  

43.

What might happen if the earth exceeds its carrying capacity?

a)

There might not be room for people to move around.

b)

There might not be enough food and water for everyone.

c)

The continents might sink into the oceans.

d)

Most of the people on the planet would starve.

44.

What happens when the birth rate equals the death rate

a)

zero population growth

b)

negative population growth

c)

positive population growth

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