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Worksheets7th grade review
Total questions: 77
Worksheet time: 1hrs 16mins
Name
Class
Date
1.
Which of the following is the smallest unit of life that can carry out all life functions?
a)
the mitochondria
b)
the vacuoles
c)
the nucleus
d)
the cell
2.
Which structures are found in every living cell?
a)
cell membrane and cytoplasm
b)
chloroplasts and mitochondria
c)
a cell wall and nucleus
d)
chloroplasts and cell wall
3.
Which cell structure is found in plant and animals cells and controls what can come into or leave a cell?
a)
cell membrane
b)
cytoplasm
c)
nucleus
d)
vacuole
4.
What is the function of the cell nucleus found in both plant and animal cells?
a)
to produce energy
b)
to control cell activity
c)
to remove waste products
d)
to allow molecules to enter the cell
5.
Cell organelles that are responsible for digesting food, worn out organelles and other cellular wastes are called ___________________.
a)
Mitochondria
b)
Vacuoles
c)
Lysosomes
d)
Chlororplasts
6.
What is one basic function of the vacuoles?
a)
circulating oxygen
b)
producing food
c)
controlling cell processes
d)
storing water
7.
Chloroplasts in plant cells allow the plant to perform a function that animal cells cannot do. What is the main function of the chloroplasts found in plant cells?
a)
to absorb light energy and manufacture food
b)
to remove waste materials by active transport
c)
to manufacture chemical energy from food
d)
to control the shape of the cell
8.
All cells need energy to function. Which cell organelle is responsible for producing energy in the cell?
a)
chloroplasts
b)
mitochondria
c)
nucleus
d)
vacuoles
9.
What is the function of a cell wall?
a)
to protect and support the cell
b)
to perform different functions in each cell
c)
to prevent water from passing through it
d)
to prevent oxygen from entering the cell
10.
In what part of the plant cell does the process of photosynthesis take place?
a)
nucleus
b)
mitochondria
c)
chloroplasts
d)
vacuoles
11.
Cells with a nucleus and membrane-bound organelles are called ____________________.
a)
prokaryotes
b)
eukaryotes
c)
bacteria
d)
protists
12.
_ are organelles responsible for digesting certain materials within the cell.
a)
vacuoles
b)
chloroplasts
c)
lysosomes
d)
cell membrane
13.
Which of the following is not part of the cell theory?
a)
cells must contain DNA
b)
all living things are made from cells
c)
cells can only come from other cells
d)
cells are the basic unit of life
14.
He discovered that all plants are made of cells:
a)
Anton van Leeuwenhoek
b)
Theordor Schwann
c)
Robert Hooke
d)
Mattias Schleiden
15.
Who was the first person to see cells under the microscope and give them their name?
a)
Mattias Schleiden
b)
Robert Hooke
c)
Theordor Schwann
d)
Anton van Leeuwenhoek
16.
Chloroplasts are organelles that convert light energy to sugars. These organelles are found only in plants. Which organelles are found only in animals?
a)
Golgi apparatus
b)
lysosomes
c)
mitochondria
d)
ribosomes
17.
The basic unit of structure and function in a living things.
a)
chloroplast
b)
nucleus
c)
cell
d)
cell membrane
18.
B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
19.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
20.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
21.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
22.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
23.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
24.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
25.
What is one advantage of sexual reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather thna from eggs
d)
offspring inherit a wider variety of genetic information
26.
How many times in meiosis does the cell divided?
a)
2
b)
4
c)
3
d)
1
27.
What phase is shown in the picture?
a)
anaphase 1
b)
anaphase 2
c)
metaphase 1
d)
telophase 1
28.
The sex of an offspring is determined by ______________________.
a)
the mother
b)
the father
c)
the mother and the father
d)
by the environment
29.
Red/green color blindness is a recessive trait. A woman who is a carrier for this allele marries a normal-vision male. What is the probability that they will have a child who is color blind?
a)
1/4
b)
1/2
c)
3/4
d)
1
30.
Why do scientists use the scientific method?
a)
To make sure they get credit for their discoveries.
b)
To make sure their results are valid and can be performed by other scientists.
c)
So that other scientist don't get mad at them
31.
True or False: Your hypothesis can never be wrong.
a)
True
b)
False
32.
If plants are exposed to sunlight, then they will grow taller.
What part of the scientific method is this an example of?
What part of the scientific method is this an example of?
a)
Procedure
b)
Hypothesis
c)
Question
d)
Results
33.
What step does every scientific experiment begin with?
a)
hypothesis
b)
question/problem
c)
procedures
d)
conclusion
34.
The summary at the end of an experiment that explains the results.
a)
conclusion
b)
procedures
c)
materials
d)
hypothesis
35.
What are the procedures step in the experiment?
a)
the conclusion to your experiment
b)
the materials needed to complete experiment
c)
step by step directions of how to complete your experiment
d)
an educated, best guess
36.
The independent variable is the ONE thing you _____.
a)
change on purpose
b)
control or keep constant
c)
measure
37.
Anything that can change in an experiment. There are three types of these in an experiment.
a)
variables
b)
constant
c)
independent
d)
dependent
38.
The variable that is being measured or observed is called the _______________. Hint: this is the variable that is the result or effect
a)
independent variable
b)
dependent variable
c)
control variable
39.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid: water, apple juice, or milk. What variables should be kept constant/controlled?
a)
type of plant, flower pot, soil, and amount of sunlight
b)
water, apple juice, milk
c)
only the amount of sunlight
d)
type of plant only
40.
Why do we want to test one variable at a time?
a)
Because it is hard to setup a data table with more
b)
To know what is causing the changes. This helps us understand cause and effect.
c)
It is what has always been done
41.
What is a constant/control in an experiment?
a)
Things that do not change inana experiment. It's the variable that stays the same. You can have many variables stay the same.
b)
It's the variables that the scientist changes in the experiment
c)
It's the variables that are being measured in an experiment
42.
What is being changed in this experiment?
a)
ramp height
b)
the speed that the ball rolls
c)
type of ball
43.
What is being measured or the result/effect of this experiment?
a)
ramp height
b)
the speed that the ball rolls
c)
type of ball
44.
What is being kept constant?
a)
ramp height
b)
speed of the ball rolling
c)
type of ball
45.
Fine hairs that allow protist to move is called what?
a)
Pseudopods
b)
Euglena
c)
Flagella
d)
Cilia
46.
What is the name of the structure shown in the model?
a)
cilia
b)
flagella
c)
amoeba
d)
pseudopod
47.
Which is NOT an example of a plant-like protist?
a)
Bacteria
b)
Algae
c)
Euglena
d)
Diatom
48.
Is algae plant-like, fungus-like, or animal-like?
a)
Fungus-like
b)
Plant-like
c)
Animal-like
49.
Which protist is this?
a)
Amoeba
b)
Paramecium
c)
Plasmodium
50.
How do paramecium move?
a)
Cilia
b)
Flagella
c)
Cytoplasmic streaming (psuedopods)
51.
Prokaryotes are unlike all other organisms in that their cells
a)
do not have a nucleus
b)
have organelles
c)
have cell walls
52.
Name the three cell shapes of prokaryotes
a)
rod, circle spiral
b)
cocci, bacilli, spirilli
c)
crystal, tube, spaghetti
53.
Name this bacteria shape
a)
coccus
b)
spirillum
c)
bacillus
54.
Name this bacteria shape
a)
bacillus
b)
coccus
c)
spirillum
55.
Name this bacteria shape
a)
bacillus
b)
coccus
c)
spirillum
56.
Name this bacteria shape
a)
coccus
b)
bacillus
c)
spirillum
57.
True or False: Some types of bacteria eat and clean up oil spills
a)
True
b)
False
58.
Bacteria cells are exactly like animal cells
a)
True
b)
False
59.
Bacteria are unicellular
a)
True
b)
False
60.
Most bacteria are...
a)
Autotrophs
b)
Heterotrophs
61.
Archaebacteria live in extreme environments
a)
True
b)
False
62.
Reasons that viruses are considered to be nonliving is because
a)
They are not cellular
b)
They cannot reproduce on their own
c)
They cannot make proteins
d)
all of the above
63.
What do viruses need to reproduce?
a)
they need genetic material
b)
They need a host cell
c)
They need bacteria
d)
They need insulin
64.
A(n) _____ is a virus that enters a bacterial cell.
a)
endospore
b)
decomposer
c)
plasmid
d)
bacteriophage
65.
When a virus invades a living cell, its _______
takes over the cell's functions.
takes over the cell's functions.
a)
outer coat
b)
genetic material
c)
core
d)
cytoplasm
66.
Viruses are cells.
a)
True
b)
False
67.
Which are examples of fungi?
a)
mold
b)
yeast
c)
mushrooms
d)
all of the above
68.
Fungi are like animals because...
a)
they all reproduce sexually.
b)
they get their food from other organisms.
c)
they can move from one place to another.
d)
They are not like animals.
69.
What part of a fungus is described as long, thread-like structures that absorb nutrients?
a)
roots
b)
fruit body
c)
hyphae
d)
spores
70.
What part of a fungus is used for reproduction?
a)
spores
b)
flagellum
c)
cilia
d)
hyphae
71.
What vocabulary word describes the breaking off of dead things and recycling it's nutrients through the food chain?
a)
Symbiosis
b)
Decomposing
c)
Budding
d)
Mycelium
72.
A collective mass of hyphae are referred to as ____________
a)
parasitic
b)
fruiting
c)
mycelium
d)
spores
73.
Mold is classified into which of the following kingdoms?
a)
plantae
b)
fungi
c)
protista
d)
bacteria
74.
__________ are fungi that produce the gas that makes bread rise.
a)
mushrooms
b)
athlete's foot
c)
blue cheese
d)
yeast
75.
Fungi obtain water and nutrients through hyphae. What are hyphae?
a)
hair-like structures to gather food in water environments
b)
structures that help fungi to gather light
c)
structures that produce spores
d)
fibrous strands that will grow towards food or water
76.
Any method of reproducing that create offspring identical to the single parent.
a)
asexual
b)
budding
c)
sexual
d)
sporogenesis
77.
What term is used for fungi that feed on living organisms but cause harm to the organism?
a)
Saprophytic
b)
Parasitic
c)
Cilia
d)
ymbiotic
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