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Y9 Ecosystems Revision

Total questions: 52

Worksheet time: 57mins

Name
Class
Date
1.

Which of the following groups are abiotic?

a)

bird, fish, tree, frog

b)

shark, manatee, fly, lizard

c)

water, shark, tree, soil

d)

water, sun, 98 degrees, soil

2.

Choose all the abiotic factors.

a)

Water

b)

Birds

c)

Rocks

d)

Sunflower

3.

Name the organism that eats other plants or animals for energy and nutrients. 

a)

Homotroph

b)

Heterotroph

c)

Carnivores

d)

Producer

4.
What is mutualism?
a)
One organism benefits greatly and the other is not harmed
b)
One organism benefits while the other is harmed
c)
Close relationship where both organisms benefit
5.
A limited supply of food and shelter in the same habitat will lead to -
a)
mutualism
b)
parasitism
c)
competition
d)
environmental changes
6.
What is the type of symbiotic relationship that helps one organism, but does not harm or help the other?
a)
parasitism
b)
mutualism
c)
commensalism
d)
symbiosis
7.
Which of these populations is most likely to decrease if the number of grasshoppers decreases?
a)
plants
b)
frog
c)
praying mantis
d)
owl
8.

True or False: The population size of predators are equal to the population size of prey.

a)

True

b)

False

9.

Any relationship in which two different species use each other to live is called _________________.

a)

Predation

b)

Symbiosis

c)

Competition

d)

Harmony

10.

In this food web, which animals are in competition?

a)

Hawks and coyotes

b)

Squirrels and hawks

c)

Antelopes and squirrels

d)

Hawks and mountain lions

11.

What does this image show?

a)

Food web

b)

Food chain

c)

Food pyramid

12.

How is commensalism different from mutualism?

a)

In commensalism, one species benefits while the other is unharmed; in mutualism, both species benefit

b)

In commensalism, one species is harmed while the other benefits; in mutualism, both species benefit

c)

In commensalism, neither species is harmed; in mutualism, one species is harmed

d)

In commensalism, both species benefit; in mutualism, one species harmed

13.

Which of the following is an example of a parasite?

a)

A flea

b)

An orchid

c)

An Egyptian Plover

d)

The bacteria that live in human intestines

14.

Remoras are fish that swim alongside sharks, eating scraps that the sharks leave behind. This is an example of:

a)

Amensalism

b)

Commensalism

c)

Parasitism

d)

Mutualism

15.

Mistletoe is a plant that grows in the branches of other plants. It grows by taking nutrients and water from these plants. This is an example of:

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Amensalism

16.

An example of a decomposer would be a bacterium in a dead rat.

a)

True

b)

False

17.

Heterotrophs that get energy and nutrition from dead or decaying organisms or their waste products and recycle nutrients back to the ecosystem.

a)

Producer

b)

Trophic

c)

Decomposer

d)

Autotrooph

18.

The level in an Ecological pyramid that includes all the organisms that share the same place in a food chain.

a)

Trophic Levels

b)

Toxic Levels

c)

KeKe Levels

d)

Environmental Systems

19.

What process removes CO2 from the atmosphere?

a)

nitrogen fixation

b)

photosynthesis

c)

combustion

d)

respiration

20.

Why do heterotrophs need nitrogen?

a)

to build proteins

b)

to get energy

c)

to conduct cell processes

d)

to absorb excess nitrogen from the soil

21.

What are the most important organisms to assist in the cycling of nitrogen?

a)

plants

b)

animals

c)

bacteria

d)

humans

22.

Humans negatively impact the carbon cycle by all the following except...

a)

cutting down forests for development

b)

eating more meat

c)

carpooling/taking public transportation

d)

leaving lights on in an office/building

23.

What process of the carbon cycle will release carbon into the atmosphere by decomposers?

a)

photosynthesis

b)

combustion

c)

respiration

d)

consumption

24.
Plants use _____________ to make their own food during photosynthesis.
a)
water
b)
energy from the Sun
c)
CO2
d)
water, energy from Sun, CO2
25.

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

26.

An animal that eats both plants and animals.

a)

carnivore

b)

omnivore

c)

herbivore

d)

scavenger

27.

Organisms that breakdown all the dead plants and animals and their waste and are converted into nutrients for plants.

a)

carnivores

b)

consumers

c)

producers

d)

decomposers

28.
A relationship between two species where one benefits while the other is harmed.
a)
Mutualism
b)
Commensalism
c)
Parasitism
d)
Naturalism
29.

What is the regrowth type called that grows from buds under the bark

(a)  

30.

What regrowth type happens from underground roots starting new trunks of the tree?

(a)  

31.

Which of the following affect population size?

a)

limitation of resources

b)

presence of predators

c)

migration

d)

emigration

32.

Some plants and animals have adapted to cope with droughts, foods and/or bushfires

a)

True

b)

False

33.

Adaptations to tolerate bushfires include

a)

epicormic buds

b)

thick bark

c)

lignotubers

d)

lightsabers

34.

Some animals in fire-prone areas survive by

a)

burrowing underground

b)

sensing fire and escaping

c)

sheltering in trees

d)

sitting on the ground

35.
What 2 factors decrease population size?
a)
Immigration, Births
b)
Emigration, Births
c)
Emigration, Deaths
d)
Immigration, Deaths
36.
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
37.

Look at the picture carefully. Decide if the picture shows a population or a community.


All of the animals in the rain forest.

a)

Population

b)

Community

38.

Look at each picture carefully. Decide if the picture shows a population or a community.


The deer in the forest.

a)

Population

b)

Community

39.

Choose the correct levels of Organization from lowest to highest...

a)

population, community, ecosystem, organism

b)

organism, population, community, ecosystem

c)

organism, population, ecosystem, community

40.
What is the pigment in chloroplasts that performs photosynthesis?
a)
Chlorosynthesis
b)
Chlorophyll
c)
ADP
d)
Electron Transport
41.
Which gas is removed from the atmosphere during photosynthesis?
a)
hydrogen
b)
oxygen
c)
nitrogen
d)
carbon dioxide
42.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
43.
What is the correct equation for photosynthesis?
a)
C6H12O6 + 6O2 --> 6CO2 + 6H2O
b)
6CO2 + 6O2 --> C6H12O6  + 6H2O
c)
 6CO2 + 6O2 --> 6H2O + C6H12O6
d)
6CO2 + 6H2O  -->  6O2 + C6H12O6
44.
What are the reactants of photosynthesis?
a)
carbon dioxide and oxygen
b)
water and oxygen
c)
carbon dioxide and water
d)
water and glucose
45.
The cell organelle that is the site for photosynthesis is called:
a)
mitochondria
b)
nucleus
c)
cytoplasm
d)
chloroplast
46.

Which is the correct equation for aerobic respiration?

a)

6O2 + C6H12O6 → 6CO2 + 6H2O

b)

6CO2 + H2O → O2 + 6C6H12O6

c)

6O2 + C6H12O6 → 6CO2

d)

6CO2 + 6H2O → C6H12O6

47.
Which is not a waste product of cellular respiration?
a)
Water
b)
Heat
c)
Carbon Dioxide
d)
Oxygen
48.

After strenuous exercise, a muscle cell would contain decreased amounts of ______ and increased amounts of ______ ____

a)

glucose ATP

b)

ATP glucose

c)

oxygen lactic acid

d)

lactic acid ATP

49.

Respiration releases energy so it is a...

a)

exothermic reaction

b)

endothermic reaction

50.
Which process produces CO2 as a waste product?
a)
Lactic Acid Fermentation
b)
Ethanol (Alcoholic) Fermentation
51.
Why is yeast used to bake bread? 
a)
The waste gas, CO2, makes bread rise
b)
The alcohol produced makes bread dangerous
c)
The yeast consumes O2, causing bread to rise
52.
This term refers to the production of ATP without oxygen being present.
a)
anaerobic
b)
prokaryotic
c)
biogenic
d)
organic

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