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First Semester Biology Practice Questions

Total questions: 60

Worksheet time: 1hrs 28mins

Name
Class
Date
1.

What is competition in an ecological context?

a)

A mutual benefit between two species

b)

A relationship where two or more organisms fight for limited resources

c)

A symbiotic relationship where both organisms benefit

d)

A predator-prey interaction

2.

Which statement best describes parasitism?

a)

Both organisms benefit equally from the relationship

b)

The parasite benefits while the host is harmed

c)

The host benefits while the parasite is harmed

d)

Both organisms are harmed

3.

What is an example of symbiosis?

a)

A lion hunting a zebra

b)

Bull elk fighting over a herd of cows

c)

Two species competing for water

d)

A bee pollinating a flower

4.

What is commensalism in ecological relationships?

a)

A relationship where both organisms are harmed

b)

A relationship where one organism benefits and the other is unaffected

c)

A relationship where one organism is harmed and the other benefits

d)

A relationship where both organisms benefit

5.

How does mutualism benefit the organisms involved?

a)

Only one organism survives while the other perishes

b)

Both organisms are harmed

c)

Both organisms benefit and it helps them survive

d)

It does not affect the organisms involved

6.

This variable in an experiment is the one being deliberately changed by the scientist.

a)

dependent variable

b)

independent variable

c)

data

d)

control group

7.

Should experiments be repeated over and over to see if the results are the same each time?

a)

yes

b)

no

8.

A series of steps used by scientists to solve a problem or answer a question.

a)

scientific method

b)

recipe

c)

data collection

d)

metric system

9.
You will collect and record this during an experiment.
a)
data
b)
conclusion
c)
hypothesis
d)
background research
10.
This is your prediction about how the Dependent Variable in an experiment will respond to changes in the Independent Variable.
a)
conclusion
b)
"I wonder…?"
c)
manipulated variable
d)
hypothesis
11.

240 cm = ___________ m

a)

2400

b)

24

c)

2.4

d)

0.24

12.

What is the basic unit of mass in the metric system?

a)

Liter

b)

Meter

c)

Gram

d)

Kilometer

13.
Which unit is a a measure of volume?
a)
meters
b)
grams
c)
inches
d)
liters
14.
What percentage of energy is passed on to each tropic level?
a)
10%
b)
50%
c)
90%
d)
100%
15.
Which is NOT an abiotic factor:
a)
soil
b)
air
c)
bacteria;
d)
water
16.
What might happen if you remove a primary consumer from the ecosystem?
a)
There would be more food for secondary consumers.
b)
The number of primary consumers would increase.
c)
The number of plants would increase.
d)
The number of secondary consumers would increase.
17.
A food web can be broken down into several seperate
a)
food chains
b)
food pyramids
c)
producers
d)
consumers
18.
Which represents the largest group in a food web?
a)
carnivores
b)
omnivores
c)
herbivores
d)
producers
19.
Step in the food chain, food web, or ecological pyramid
a)
trophic Level
b)
abiotic factors
c)
community 
d)
ecosystem
20.
Consumer that eats plants
a)
heterotroph
b)
herbivore
c)
producer
d)
community
21.
Consumer that eats animals or meat
a)
carnivore
b)
omnivore 
c)
consumer
d)
producer
22.
An animal that eats both other animals and plants is called:
a)
Carnivore
b)
Herbivore
c)
Omnivore
d)
Producer
23.

Which statement describes a difference between producers and consumers?

a)

All producers are types of plants, and consumers are types of animals

b)

Producers live on land, but consumers may live on land or in water

c)

Producers get energy only from consuming plant materials, and consumers get energy only from consuming other animals

d)

Producers make their own food, and consumers eat other organisms to get food

24.
A clownfish uses a sea anenome as a safe place to live. While living there, the clownfish lures in food for the anenome. This is an example of what type of relationship?
a)
Predator-Prey
b)
Commensalism
c)
Mutualism
d)
Parasitism
25.

What is the ULTIMATE source of energy for life on Earth?

a)

Plants

b)

Decomposers

c)

Sun

d)

Earth's Core

26.

A plant that makes it own food is called a(n)

a)

Autotroph

b)

Heterotroph

c)

Consumer

d)

Herbivore

27.

Which of the following is an example of a fossil fuel?

a)

Coal

b)

Solar Energy

c)

Hydroelectric Power

d)

Nuclear Power

28.

The burning of fossil fuels is known as...

a)

Decomposition

b)

Photosynthesis

c)

Combustion

d)

Respiration

29.

In order to be considered organic, a compound must contain...

a)

Hydrogen

b)

Carbon

c)

Nitrogen

d)

Phosphorus

30.

___________ is the process by which dead matter is broken down into simpler substances by detritivores.

a)

Respiration

b)

Decomposition

c)

Combustion

d)

Photosynthesis

31.

In ______________, plants use sunlight and carbon dioxide to make glucose and oxygen

a)

Combustion

b)

Respiration

c)

Decomposition

d)

Photosynthesis

32.

Which type of organisms are responsible for turning nitrogen gas into a form useable by other organisms?

a)

Animals

b)

Plantae

c)

Fungi

d)

Bacteria

33.

Which cycle involves condensation, evaporation, and precipitation?

a)

The water cycle

b)

The carbon cycle

c)

The nitrogen cycle

d)

The motor cycle

34.

Which of the following cycles needs different types of bacteria to make the most common gas in the atmosphere useful to plants?

a)

the water cycle

b)

the carbon cycle

c)

the nitrogen cycle

d)

the hydrogen cycle

35.

Which of the following cycles does photosynthesis produce oxygen and respiration produce carbon dioxide?

a)

the water cycle

b)

the carbon cycle

c)

the nitrogen cycle

d)

the hydrogen cycle

36.

Primary succession occurs in an area that has:

a)

Has Soil

b)

Has No Soil

c)

Has Some Soil

d)

none of these

37.

___ are the first organisms to colonize an area and begin the process of ecological succession.

a)

foundational organisms

b)

introductory organisms

c)

primary organisms

d)

pioneer species

38.

What is the main difference between primary and secondary ecological succession?

a)

Primary begins WITHOUT soil; Secondary begins WITH soil

b)

Primary is the first state and secondary is the second stage

c)

Primary builds plant community; secondary builds animal community.

d)

Primary begins WITH soil; Secondary begins WITHOUT soil

39.

What is an increase of biodiversity over time, after a natural or man made disturbance?

a)

ecological recession

b)

climax recession

c)

ecological succession

d)

climax succession

40.

What is an example of a disturbance that could bring about secondary succession?

a)

Humans cut down many trees in a small region

b)

A volcanic eruption covers a village in lava.

41.

A ______________ is a large molecule.

a)

Micromolecule

b)

Polymer

c)

Amino Acid

d)

Macromolecule

42.

Which of the following elements are found in all macromolecules? (Select all that apply).

a)
b)
c)
d)
43.

Which of the following is not one of the four major classes of macromolecules?

a)

Lipids

b)

Carbon

c)

Protein

d)

Carbohydrates

e)

Nucleic Acid

44.

Which macromolecule is used as our main source of energy?

a)

Lipids/Fats

b)

Nucleic Acids

c)

Proteins

d)

Carbohydrates

45.

Nucleic acids make up which of the two molecules listed below?

a)

FDA

b)

RNA

c)

DNA

d)

FDR

46.

Which macromolecule stores energy?

a)

Carbohydrates

b)

Proteins

c)

Lipids/Fats

d)

Nucleic Acids

47.

The building blocks for organic compounds are called...

a)

Polygons

b)

Polymers

c)

Monograms

d)

Monomers

48.

What is the monomer of proteins?

a)

Amino Acid

b)

Fatty Acid

c)

Nucleotide

d)

Monsaccharide

49.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
50.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
51.

Enzymes are an example of

a)

Lipids

b)

Carbohydrate

c)

Protein

d)

Nucleic Acid

52.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
53.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
54.

What happens when enzymes are heated to a high temperature?

a)

The enzymes die.

b)

The shape of the enzyme are changed and it denatures

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

55.

Activation energy

a)

proteins that speed up chemical reactions

b)

Changing substances by breaking and forming bonds (includes hydrolysis and dehydration reactions)

c)

the capacity for doing work

d)

the energy needed to start a chemical reaction

56.

Reactants

a)

the substances changed during a chemical reaction (goes into the process)

b)

the substances made by a chemical reaction (comes out of the process)

c)

substance that speeds up the rate of a chemical reaction

d)

reactant of an enzyme-catalyzed reaction

57.

Products

a)

the substances changed during a chemical reaction (goes into the process)

b)

the substances made by a chemical reaction (comes out of the process)

c)

substance that speeds up the rate of a chemical reaction

d)

reactant of an enzyme-catalyzed reaction

58.

What can be inferred using the graph?

a)

Cells can function equally as well at all pH values.

b)

Cells do not function well at pH values that are too high or too low.

c)

Cells function best at high pH values.

d)

Cells function best at low pH values.

59.

Which of the following two factors affect an enzyme's operation the most?

a)

amount of light and temperature

b)

blood glucose and pH

c)

temperature and pH

d)

amount of light and pressure

60.

How are you feeling about the final?

a)

Oh No!

b)

Ehh

c)

I think I can do it.

d)

Oh easy!

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