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7th Grade Life Science Review Flashcards | StudBud
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7th Grade Life Science Review
7th Grade Life Science Review
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Review for 7th grade science #science #middleschool
Flashcards
65 cards
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Questions
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Answers
1
An increase in salmon and trout fishing by humans in recent years has most likely resulted in..
Greater plant productivity
A reduced food supply for eagles
Reduced tourism on the Great Lakes
An increase in the life expectancy of ducks
2
Which of the following relationships would represent a wolf and a deer?
predator/prey
parasite/host
producer/consumer
producer/decomposer
3
What is the role of a producer in a food web?
It gets energy by breaking down once living matter.
It gets energy by eating living matter.
It changes solar energy (sun) to chemical energy (sugar).
It changes chemical energy (sugar) into solar energy (sun).
4
A muscle cell is specialized to ...
provide protection.
carry gasses, like oxygen & carbon dioxide.
contract and relax.
recieve and transmit signals.
5
What is the role of a decomposer in a food web?
It gets energy by breaking down once living matter.
It changes solar energy into chemical energy.
It gets energy by eating living matter.
It changes chemical energy into solar energy.
6
One parent organism produces an offspring. This is an example of...
both asexual and sexual reproduction.
sexual reproduction
asexual reproduction.
7
A viral infection can be treated with or prevented by...
an antibiotic and/or vaccine
a vaccine only
none of the above
an antibiotic only
8
Read the statement below and give your best answer.
The three species live in the same part of the trees.
The three species have the limited supply of food.
The three species occupy different niches.
The three species eat the same food.
9
Bacteria, viruses, parasites, and fungi...
all have the ability to interfere with normal body functions
all can be treated with antibiotics
all live in moist environments
all need to energy to survive
10
Interpret the pictures below. What TWO life processes do they all have in common?
Reproduce and breathe
Grow and reproduce
Eat food and grow
Breathe and eat food
11
Which of the following is true about sexual reproduction?
A sex cell from each parent combines to form a new offspring
A sex cell from one parent forms the new offspring.
The sex cell from the mother provides 25% of genes.
The sex cell from the mother provides 75% of genes.
12
A bacterial infection can be treated with or prevented by...
none of the above
a vaccine only
an antibiotic and/or a vaccine
an antibiotic only
13
Which of the following relationships would represent a tapeworm and a cow?
producer/decomposer
parasite/host
predator/prey
producer/consumer
14
Two parent organisms is ...
sexual reproduction.
both asexual and sexual reproduction.
asexual reproduction.
15
The Happy-Face Spiders below are all the same species. What term do these spiders show?
Natural Selection
Evolution
Variation
Adaptation
16
The forelimbs of all these animals are similar. What does this tell us?
All of these animals survived the same mass extinction.
All of these animals adapted to the same environment.
All of these animals have the same vestigial organs.
All of these animals share a common ancestor.
17
How do polar bears' fat cells help them survive hibernation during the long cold winter months?
They provide food and allow movement.
They provide warmth and allow movement.
They provide energy and remove waste.
They provide warmth and energy.
18
Approximately what percentage of your genes came from your biological mom?
50%
25%
75%
It depends on whether you are a boy or a girl.
19
When you are vaccinated, the vaccine...
kills viruses already inside your body.
kills bacteria already inside your body.
stimulates your body cells to produce new viruses.
stimulates your body to fight future infections.
20
What is the most important cell process for growth and development to occur?
Mitosis
Mitochondria
Osmosis
Photosynthesis
21
Plants combine H2O (liquid) and CO2 (gas) to make sugar (solid) during photosynthesis.
This is an example of osmosis.
This is an example of a chemical reaction.
This is an example of diffusion.
This is an example of a mixture.
22
Which of the following do animals, bacteria, plants and protists have in common?
reproduce sexually with another organism.
require oxygen.
are multicellular.
Must get and use energy.
23
An organ system of the body...
is made up of multiple organs working together.
works with other organ systems to help the body function.
is specialized to perform certain functions.
All of the above.
24
To perform the activities of life, all cells require...
light.
chlorophyll.
oxygen.
energy.
25
Which of the following choices lists important reasons that cells divide?
Maintenance, growth, and repair
Photosynthesis, repair, and diffusion
Repair, photosynthesis, and growth
Growth, maintenance, and diffusion
26
Scientists believe that over 99% of all species are no longer living. This points to...
there has been one mass extinction event in all of history.
None of the above.
extinction is a common event.
extinctions only happened in the past.
27
Which of the following relationships would represent a fallen tree and a mushroom?
producer/consumer
parasite/host
predator/prey
producer/decomposer
28
A group of similar organisms along with other groups of organisms in a certain area make up a..
population
species
ecosystem
community
29
Species that do not adapt to their environment are likely to...
destory their environment.
be changed by their environment.
become extinct.
become evolved.
30
What two traits below are acquired?
Chess ability & language
Eye color & height
Eye color & language
Hair color & chess ability
31
Ecosystems have different levels of organization. A group of similar organisms make up a
biome
population
habitat
community
32
All molecules are...
man-made.
the basic unit of an element.
made of two or more atoms.
made of only one type of atom.
33
A goat has a gene for white fur, but its fur is black. This is possible because...
The gene for white fur is dominant and "wins" over the black
The gene for white fur is recessive and "wins" over black
The gene for black fur is dominant and "wins" over the white
The gene for black fur is recessive and "wins" over white
34
What happens to the amount of matter (water) as it moves through the ecosystems?
stays the same
increase then decrease
decrease then increase
increases
35
How are the reproductive cells in the picture below different from other cells?
They have double the amount of genes.
They have half the amount of genes.
They have no genes.
They have triple the amount of genes.
36
Inherited traits are passed from parents to offspring....
during spontaneous generation.
through genes located on chromosomes
by cell division.
in unpredictable patterns.
37
Which of the following structures is found in plant cells but not in animal cells?
Mitochondria
Nucleus
Cell membrane
Cell Wall
38
A lichen is an example of a symbiotic relationship. That means that...
The algae benefits and the fungus does not.
Neither organism benefits.
The fungus benefits and algae does not.
Both organisms benefit.
39
You have a sore throat and a fever. This was caused by...
being infected by a germ
improper nutrition
being outside in the cold for too long.
wet feet and hair
40
Which of the following statements is true?
The basic building block of an element is a compound.
The basic building block of an element is an atom.
The basic building block of a compound is an atom.
The basic building block of an element is a molecule.
41
All compounds are ....
made of two or more elements.
the basic building blocks of matter.
made of only one atom.
man-made.
42
Which of the following relationships would represent grass and a prairie dog?
parasite/host
producer/consumer
producer/decomposer
predator/prey
43
Dinosaurs used to roam the Earth. What evidence do we have to support this statement?
Scientists are unsure of the existence of dinosaurs.
Scientists observed and recorded their extinction.
Scientists found cave paintings of dinosaur-like creatures.
Scientists have found many fossilized remains of dinosaurs.
44
What two systems break down necessary nutrients and transport them to the muscles?
Respiratory and circulatory
Urinary and digestive
Digestive and circulatory
Skin and respiratory
45
A section of chromosome that codes for a trait is called a ...
nitrogen base.
gene.
nucleotide.
centromere.
46
What is the role of a consumer in a food web?
It changes solar energy (sun) into chemical energy (sugar).
It changes chemical energy (sugar) into solar energy (sun).
It gets energy by eating other organisms.
It gets energy by breaking down once living matter.
47
The process of converting solar energy (sun) to chemical energy is called...
photosynthesis
fermentation
osmosis
cellular respiration
48
Fill in this sentence below with the correct words.
Genes, DNA
DNA, chromosomes
DNA, genes
Chromosomes, genes
49
An example of an animal produced through the process of selective breeding is the...
Fox
Coyote
German Shepherd
Wolf
50
Which of the following is true of genes?
Genes are sections of DNA.
Genes are found on chromosomes.
All of the above.
Genes are found in cells.
51
Your body's NATURAL defense against microscopic organisms and foreign substances is...
vaccines
Flintstone vitaminsq
antibiotics
the immune system
52
Arrange the following levels of organization from simplest to most complex:
Tissue, cell, organ, organ system, organism
Cell, tissue, organ, organ system, organism
Organism, organ system, organ, tissue, cell
Cell, tissue, organ system, organ, organism
53
In a food chain, what happens to the amount of available energy as it travels through the chain
Increase then decrease
Decreases
Stays the same
Decrease then increase
54
A skin cell is specialized to ...
carry gasses, like oxygen & carbon dioxide.
receive and transmit signals.
contract and relax.
provide protection.
55
Camouflage allows organisms to blend in with their environment. This is an example of...
Adaptation
Overproduction
Natural Selection
Evolution
56
A nerve cell is specialized to ...
carry gasses like oxygen and carbon dioxide.
contract and relax.
receive and transmit signals.
provide protection.
57
Offspring have genetic information from both parents is because of...
sexual reproduction.
asexual reproduction.
both asexual and sexual reproduction.
58
Many plant cells, particularly in leaves, are green in color because of the presence of ...
Mitochondria
Cytoplasm
Cell walls
Chloroplasts
59
The whale's hind leg bones are shown in the circle. What does this tell us?
A whale's ancestor used to live in water.
A whale's ancestor used to fly
A whale's ancestor used to walk on land.
A whale's ancestor used to slither snake-like on land.
60
What would happen if the cells of your body could not divide?
The cut would be unable to heal.
The cells around the cut would stretch to cover the injury.
The cut would take longer to heal.
Your body would heal the cut with cells from other areas.
61
The correct order of who would have the most mitosis taking place to who would have the least?
Baby, 12-year-old, 12-year-old with injury, 30-year-old
30-year-old, 12-year-old with injury, 12-year-old, baby
Baby, 12-year-old with injury, 12-year-old, 30-year-old
12-year-old, baby, 12-year-old with injury, 30-year-old
62
A person receives their eye color by...
acquiring it over time.
environmental factors.
None of the above.
inheriting it from their parents.
63
All of the grey squirrels that live in your neighborhood area are an example of a(n)...
biome.
community.
population.
ecosystem.
64
Sugar (form of energy) made during photosynthesis can be...
used immediately
stored for later use.
can be used by other organisms.
all of the above
65
When the offspring is genetically identical to the parent offspring that is because of...
both asexual and sexual reproduction.
sexual reproduction
asexual reproduction.
