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MOD NGSS Post Test 7th Grade Life Science (4/29/2025) (4/30/2025)

Last updated 4 months ago

100 questions

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Cells in a many-celled organism all ______.

work together in groups as tissues, organs, and organ systems

perform similar functions in all parts of the body

Which of the following is NOT part of the cell theory?

cells make up many substances that were never living

the basic unit of all organisms is the cell

all organisms are made of one or more cells

cells divide to form new cells

Animals ____________________________________.

are many-celled and can move independently

have cells that contain chloroplasts

Plants ______________________________________.

do not make their own food

are made of many cells

What do all living things have in common?

have hair

are made of cells that came from other cells

In which organelle does cellular respiration occur in a consumer?

mitochondria

nucleus

What is the outer boundary of all cells that controls what enters and leaves the cell?

cell membrane

nuclear membrane

What type of cells are plant and animal cells classified as?

prokaryotic

eukaryotic

Which part of the cell controls all activity that takes place in the cell?

ribosomes

nucleus

Where does photosynthesis take place in plant cells?

nucleus

chloroplasts

Which of the following shows how a many-celled organism is organized from smallest to largest?

cell, tissue, organ, organ system

organ system, tissue, cell, organ

Which system pumps oxygen-rich blood and nutrients throughout the body?

digestive

circulatory

Which system expands and contracts to move body parts, pump our heart, and helps us to swallow?

excretory

muscular

Which system is responsible for breaking down food and absorbing nutrients from the food?

digestive

circulatory

Why might animals, such as a bison
, live in a group?

provides safety from predators

help keep warm

less likely to get lost during migration

all of the choices above are correct

A flower like the Scarlet Pimpernel most likely has bright colored petals to______.

create more pollen

attract insects for pollination

Cactus flowers that open only at night are usually white or yellow and have a strong scent because_______.

they must survive the desert heat

the scent attracts insects in the dark

An animal like a tiger sets up a territory that covers several miles.  He establishes this territory to use for____.

feeding

mating

raising young

all of the above

Which of the following would increase the chances of flowers reproducing?

having pollen that is securely trapped in a closed flower

having pollen that easily blows through the air from one plant to another

What might be the affect of a drought (lack of rain) on the growth of a plant?

It would have no effect on the plant.

The plant will be smaller than it would normally be if it does not get enough water.

Wolves raised in areas with limited prey would most likely be _______ compared to wolves raised in an area with many prey.

smaller

larger

A larger pond would likely have ______________ fish compared to a smaller pond.

smaller

larger

Why would plants grow bigger near a river bank than in an open field?

They would get more sunlight near a river bank than in an open field

Their roots can grow to where they have a more consistent water supply

In twins that are 
genetically identical, why might differences exist between them?

nutrition, environment, personality and experiences also impact characteristics

different genes exist even though they are twins

What is the energy source required for photosynthesis to occur?

sunlight

oxygen

What is chlorophyll?

a green pigment to trap light energy

a yellow pigment that expels oxygen

What gas is produced in photosynthesis?

oxygen

carbon dioxide

What chemical energy is produced in photosynthesis?

carbon dioxide

glucose

When a person eats apples, peaches, carrots, and lettuce, they get energy.  What compound is passed from plants to humans to give them energy?

oxygen

glucose

In what part of the cell does respiration take place?

nucleus

mitochondria

What gas is needed for respiration to take place?

carbon dioxide

oxygen

What is the primary purpose of cellular respiration?

to break down sugar and release energy

to make glucose for plants

While Matt was outside in January when the temperature was 12°F, his body temperature stayed at 98.6°F.  What process did his body use to maintain his body temperature?

cell division

homeostasis

A bird is nearly captured by a cat.  How does the bird now know to stay away from the cat?

The bird’s sensory receptors responded to the incident and stored a message that reminds the bird of the fear the cat once created

The bird was born knowing a list of animals to fear.

Which of the following shows how a dog adjusts from spring to summer?

increased body fat

shedding fur

Receptors in the muscles provide the brain with information about body position and movement.  In this case the muscular system is working with the_____________.

digestive system

nervous system

Janet accidentally touched a hot pan on the stove and screamed.  What is the stimulus in this event?

Touching the hot pan

The scream

A population of robins lives in a grove of trees in a park. Over the next several years some of the trees are cut down due to a disease that has moved into the area.  The lack of nesting space for the robins is seen as a _________.

limiting factor

carrying capacity

Polar bears are found all around the North Pole.  The natural environment where any species lives is its _____.

habitat

community

The rabbit population in a forested area has been about the same for the last several years.  A group of fox have recently migrated into the forest looking for a new water supply.  What do you predict will happen to the rabbit population in the next few years?

decrease

increase

Looking at the chart,
 what might have happened that would cause the change in the grasshopper population from 2003 to 2004?

fewer predators in the area

more predators in the area

What relationship is shown between the amount of precipitation and number of fawns?

When precipitation peaks, fawn numbers are highest.

The lowest amounts of precipitation results in the greatest fawn population.

Sharksuckers attach themselves to sharks. They feed on the leftovers from the shark’s meals and do not hurt the shark. This relationship is an example of ______________.

parasitism

commensalism

Certain protozoans live in the intestines of termites. The termites eat wood, which the protozoans digest. They both benefit and depend on each other for survival. What type of relationship does this situation describe?

parasitism

mutualism

Some poisonous snakes have a heat-seeking system to help locate mammals like mice. The snake strikes and injects venom into the mouse. The snake might wait for the mouse to die before swallowing it. What type of relationship does this situation describe?

parasitism

predator/prey

A vampire bat drinks the blood of horses.  The horses can become weak from loss of blood. This is an example of _____________.

parasitism

mutualism

When the main food source of two different species is the same, what would you expect to result?

competition over food

the food supply would increase based on demand

Most energy used by living things can be traced back to the sun.

True

False

What answer best demonstrates the flow of energy on a food chain?

grass --> insect --> bird

grass <-- insect <-- bird

Where would a plant be placed on the energy pyramid?

in the middle

at the bottom

Living things in the environment are ______ factors

biotic

abiotic

Organisms that make their own food from sunlight are _____________.

herbivores

producers

If a disease killed most of the mice in an area, what would you expect to happen?

snake population would increase

snake population would decrease

In 1993, the Midwest experienced large amounts of flooding.  The floods caused the squirrel population to drastically decline in six states.  Flooding would be a(n) ________________ factor.

parasitic

abiotic

An increase in the fox population would most likely do what to the rabbit population?

cause the rabbit population to rise

cause the rabbit population to decrease

What would most likely happen if the water temperature of a lake increased ten degrees above what it had ever been before?

Ten degrees would most likely mean that populations would remain stable.

Some of the organisms would not be able to adapt to the change and their population would decline.

Trash flies out of a boat into the ocean.  The plastic rings from a 6-pack of soda cans land in the ocean water.  How does this affect birds that live in the ocean habitat?

They use the rings as a home.

The rings become tangled on their bodies.

A pond has a large amount of algae growing on the top. What should be considered before releasing algae 
eating fish into the pond to fix the problem?

If the fish have predators that should be controlling other populations of fish in the pond.

If the algae was a food source for other fish that will now have too much competition to survive.

Both of the above ideas should be considered.

One insect eating bat was introduced to an area by a farmer having problems with insects eating the corn crop.  What would be most important for the farmer to consider before bringing in more bats?

Are the bats eating insects that are pollinating corn and other crops?

Is that type of bat only supposed to live in other areas of the world?

Which question should be considered in bringing a new predator into an area to reduce the mosquito 
population?

What animals rely upon mosquitos as a food source?

Are there flowers that may become extinct without mosquitoes to spread their pollen?

Both of the above answers should be considered.

Lumber companies in the past cut down all the trees and moved to the next area.  Now many lumber companies participate in reforestation, planting new trees to replace those cut down.  What impact does reforestation have on the environment?

positive – reforestation provides a sustainable plan to use a renewable resource

negative – reforestation provides a sustainable plan to use a nonrenewable resource

There are several sources of land/soil degradation.  All BUT __________ is a cause of soil or land degradation.

overgrazing

water erosion

crop rotation

If an animal lived in an Arctic climate and a mutation caused their hair to grow thicker, it would be 
considered __________.

beneficial

harmful

A mutation in a gene is always harmful.

True

False

A mutation in DNA may mean that a different __________ is made.

fabric

protein

If you are lactose intolerant and cannot digest milk products, it is the result of a mutated message in your ___________.

lysosomes

chromosomes

Instructions an organism’s body uses for making proteins come originally from _______.

DNA

ribosomes

Organisms that reproduce asexually require ________ parent organism(s).

at least 2

only 1

When a part of a plant can be cut from the parent plant and grow into a genetically identical plant, it is an example of _____________ reproduction.

asexual

sexual

Budding, fission, and regeneration are examples of ______________ reproduction.

sexual

asexual

The offspring from asexual reproduction should look exactly like the parent.

True

False

Which of these is a characteristic of sexual reproduction?

It forms exact copies of the parent cell.

It results in offspring with genetic variation.

Most organisms throughout Earth’s history have become extinct because ____
_____.

they haven’t adapted to changes in their environment

asteroids have hit the Earth

Most fossils are found in

Igneous rock

Sedimentary rock

Which is the most likely reason a particular type of fossil with many bones and teeth has only been found in deep layers of earth?

The organism became extinct before the more recent layers were being formed.

The organism is sure to exist in other time periods but did not become fossilized.

Fossils of a shellfish were found high on the top of a mountain. Which BEST explains how this is possible?

the rocks of the mountain were once under water

the shellfish were brought there by humans millions of years ago

Fossil A is found in a layer of rock below Fossil B. Based on this information, which statement is correct?

Fossil A is older than Fossil B.

Fossil B is older than Fossil A.

Which of the following would you expect to find if you were to examine a hummingbird 2,000 years from now and compare them to hummingbirds that exist today?

they would look exactly like those that exist today

there may be subtle differences based on changes in the environment

What reasoning did Darwin use after observing that finches on different islands would be related despite having such different beaks?

A finch’s beak does not determine its species.

Each finch appeared quite similar except for the beaks that seemed to be related to the food available to them.

Even though a man’s arm, cow’s leg, horse’s leg, whale’s flipper, and bird’s claw may appear to be quite different, upon closer examination ___________.

with one stronger bone, followed by two bones that work together in the next section of the appendage, so with approximately the same number of bones and similar structure, they could be related. 

similarly structured fingers show they are closely related.

How can fossils BEST help scientists classify organisms?

Fossils allow scientists to predict what species will become extinct.

Fossils allow scientists to have an idea of the time scale that traits evolved.

Scientists discovered fossil evidence that giraffes' necks have gotten longer over time.  What idea would support why this change was helpful?

tree branches grew closer to the ground over time

competition for leaves that grow closer to the ground

A full grown chicken and turtle have few similarities, but looked very similar at early developmental stages.  What study would support this reasoning?

Embryology

Vestigial Structures

What can examining these pictures of the early development of the
fish, salamander, tortoise, and chick tell us about these organisms?

 Similarities early on may mean that these organisms are closely related.

Great differences early on shows there is no relationship between these organisms.

Evolutionary biologists study embryos of different organisms in order to _____.

understand the different adaptations used by a species

learn which organisms might be related to each other

In 2001, scientists announced they had discovered a species of dinosaur called Albertaceratops nesmoi.  How would scientists have determined that this species was related to other known species of dinosaur?

Scientists would make careful observations of behavioral patterns.

Scientists made a detailed analysis of the fossilized bones of each species and compared them.

A common ancestor is evident when comparing ______________ of different species in the phylum Chordata, especially in the earliest stages of development.

embryos

motility

Species that reproduce _______________________ would be expected to survive best.

asexually with few variations

sexually with many variations

During a storm, several butterfly-eating birds were blown to a distant island.  The island, which previously had no birds, was filled with butterflies of all colors.  One year later, all the butterflies are dark green and brown.  Which would best explain the change in the butterfly population?

Green and brown were best camouflaged and therefore better adapted to the changing environment.

Primates like to eat all the other butterflies.

A highly biodiverse tropical rainforest started to become colder and drier, causing some populations to become extinct. Identify the organisms best suited to this new climate.

Organisms who require water to lay eggs.

Organisms who are able to grow fur to stay warm.

Which is NOT an example of human influence on tomato plant traits?

In years of drought tomatoes produced the following year require less water than previous generations.

Farmers only take seeds from plants that produced the largest tomatoes to plant the following year.

Farmers choose to cross a corn plant that produces many ears of corn with one in which the corn kernels develop very quickly. They hope this will increase their profits in the next year.  What does this example show?

Natural selection in its purest form

How humans have influenced traits within an organism

What does the picture of the squirrel, with trash wrapped around its neck and in its hands, tell us about human impact on evolution?

Humans create greater challenges for organisms today than those they would find in a natural environment.

Humans do not have any impact on the environment.

The Animal Functional Genomics Laboratory conducts genetic research involving farm animals. The results can be used to genetically modify useful species of animals. Why might people argue against this research?

Genetically modified animals are NOT commercially useful.

A designed genetic change may produce unpredictable effects.

A gene for disease resistance in fir trees is transferred to pine trees using modern DNA technology. How might this be economically helpful to tree farmers?

Abnormal pine tree growth would be eliminated.

More pine trees would live to maturity, increasing lumber output.

Hummingbirds were introduced to Fairy Park in 1980. The hummingbirds were attracted to the pink daisies.  Using the table of Daisy Populations, what most likely explains the shift in the daisy population from 1970 to 2000?

Random reproduction means that traits that are most common in a population shift approximately every 30 years.

The new hummingbird’s attraction to the pink daisies meant that they were more frequently pollinated than past generations, leading to an increase in their population.

Looking at the chart, what is the best explanation of why there
would be more insects found alive in a building after spraying the same insecticide repeatedly?

Some of the insects are not affected by the insecticide and are able to continue reproducing and increasing their populations each generation.

The chemical company must have started using a different formula in October.

Every time the population of rabbits peaks, the population of foxes rises slightly.  What would you expect to happen to the size of the rabbit population if a mutation occurred that allowed some of the rabbits to jump high into trees, avoiding foxes?

It would go up because more rabbits would be able to escape the foxes.

It would go down because there would be more predators that could see them in the trees.

In order for natural selection to occur, Charles Darwin stated we must begin with a population of organisms that has genetic ___________.

competition

variation

Natural selection is best represented by which mathematical concept when variations lead to better adap
ted traits?

Uniform trait distribution

Greater survival and reproduction rates