Which statement best explains how deforestation that is the result of forest fires can contribute to global warming?

Burning the trees adds carbon dioxide to the atmosphere.

Burning the trees adds smoke to the atmosphere and blocks sunlight.

Deforestation removes trees that produce carbon dioxide through the process of photosynthesis.

Deforestation immediately increases ecosystem stability needed in the burned area.

In the California Mojave Desert, an energy company is building a large solar-power facility. It is expected to produce enough power for 140,000 homes and also cut carbon dioxide emissions by 500,000 tons a year. The facility will be built on 4,050 acres of wildlife habitat, which is near a protected refuge for a species of desert tortoise. The decision to build this power plant is most likely based on

a trade-off, weighing the need for a cleaner energy source versus the protection of a natural resource

proving that positive atmospheric changes are less important than preserving wildlife

the fact that building these solar-power energy plants disrupts wildlife habitats

providing evidence that technological advances always produce positive environmental impacts

A 1°C increase in temperature had what effect on the marine ecosystem?

It caused a decrease in marine biodiversity.

It had no effect on the marine ecosystem.

It increased the population of marine species.

These test panels provided scientists with information about

the effect of environmental change on the biodiversity of the Antarctic Ocean

how ecological niches influence the rate of mutation

the variety of producer/consumer relationships in the Antarctic Ocean

how the stability of an ecosystem is affected by competition and disease

Scientists are concerned about the decreasing numbers in the populations of Atlantic salmon along the east coast of North America due to overfishing and changes in their breeding environments. Some businesses have developed farm-raised populations of certain varieties of salmon. Large, farm-raised populations have a limited genetic diversity as compared to wild-caught salmon.

Loss of biodiversity among farmed fish, Increased sales of fish, a food source

Increased sales of fish, a food source, Limited genetic diversity in salmon population

Loss of biodiversity in wild fish, Decreased population size

Increased biodiversity, Increased population size

Decomposers are necessary in a food chain because they

return nutrients to the ecosystem

manufacture food by photosynthesis

A food web is represented below. Which organism is correctly paired with its role in the ecosystem?

The grasshoppers function as consumers and heterotrophs.

The grass is both a consumer and a decomposer.

The toads function as consumers and autotrophs.

The snakes are both consumers and herbivores.

Base your answer on the information and diagram below and on your knowledge of biology. The diagram represents the energy relationships in a forest ecosystem. The best explanation for the decrease in the amount of energy available as one moves up the pyramid is that

much of the energy at each level is lost as heat

producers require more energy than consumers to survive

decomposers recycle nutrients at each level

animals use less energy than plants

Populations of organisms making up an Arctic food chain are represented below. Which statement concerning this food chain is the most accurate?

A reduction in the algae populations would most likely affect the survival of all the other populations in this food chain.

The greatest amount of energy in this food chain is located in the polar bear population.

Zooplankton, which provide food for the cod, are the main producers in this chain.

The organisms in this chain can all produce their own energy during long periods of cold weather.

The diagram below represents a remora fish attached to a shark. A remora fish has an adhesive disk or sucker on its head, which it uses to attach itself to larger fishes, such as sharks. This attachment causes the shark no harm. The remora fish eat scraps of food that the sharks drop as they feed. This is an example of

an adaptation to a specialized niche

an adaptation of a successful parasite

competition between two fish species for food

competition for abiotic resources

Powassan is a rare, tick-borne virus that is found in areas near the Great Lakes and the northeastern United States. The tick is not affected by the virus, but humans bitten by a tick carrying the virus will develop a serious illness. The risk of getting the Powassan virus is greatest in June and July. This information supports the concept that

relationships between organisms may be negative, neutral, or positive

all viruses around the Great Lakes are spread by infected ticks

this virus is harmful to all living organisms that it infects

time of year, alone, determines if infection with the Powassan virus is possible

As a population of organisms within a forest ecosystem increases, the size of the population is eventually limited by

a finite supply of water and nutrients

the overproduction of their food supply

the size of similar populations in a nearby ecosystem

Hummingbirds, with their long beaks and tongues, are attracted to long, tubular flowers with a lot of nectar. When a hummingbird consumes the nectar from a flower, pollen sticks to the hummingbird and is transferred when the hummingbird feeds from other flowers. This relationship between the flowers and hummingbirds is a result of

natural selection of beneficial variations

changes in hummingbirds and flowers in response to their needs

inheritance of characteristics acquired during their lifetime

the environment modifying gene expression

Which characteristic is common to most types of cancer?

rapid and uncontrolled cell division

production of low levels of ATP

Which sequence best represents the correct order of events in the formation of a sexually reproduced individual?

gametes → zygote → embryo → fetus

embryo → zygote → gamete → fetus

zygot → embryo → fetus → gamete

gametes → embryo → fetus → zygote

The graph below represents a change in event A that leads to changes in events B and C. Which row in the chart best identifies each event in the graph?

deforestation, amount of biodiversity, atmospheric concentration of carbon dioxide

industrialization, energy consumption, global temperature

loss of ozone layer, global warming, rate of skin cancer

human population, consumption of resources, habitat preservation

Scientists who have examined the fossil record have noted that some species have changed very little over long periods of geologic time. The lack of change in such organisms is most likely because

the environment that they lived in remained the same, and they were well-adapted to it

all members of their population were genetically identical, and they lived in a rapidly changing environment

there was a large amount of variation in their population, and the environment changed frequently

they could move between different environments when food supplies became scarce

Which three processes usually result in the greatest variety of possible gene combinations?

mutation, meiosis, and fertilization

differentiation, mitosis, and fertilization

cloning, meiosis, and fertilization

differentiation, mutation, and fertilization

All the genetic information necessary for the growth and development in a sexually reproducing animal is present in

either sperm cells or egg cells

The diagram below represents relationships in an ecosystem. What is the primary source of energy in this environment?

cellular respiration in the plants

energy from minerals in the soil

A genetic change that occurs in a body cell of a mouse will not contribute to the evolution of the species because

the evolution of a species can result from changes in reproductive cells, not body cells

body cell mutations will cause the cell to die before it reproduces

random changes are repaired by enzymes before they are passed on to offspring

the evolution of a species is caused by natural selection, not genetic variation

The endangered Everglade snail kite is a predatory bird which usually feeds on small snails. Conservationists feared the snail kite would face a greater decline when the Everglades was invaded by a species of larger snail that the birds had historically struggled to eat. But the snail kite population increased over several years, and the snail kites now have larger beaks and bodies. This change in the snail kite can best be explained by

natural selection after an environmental change

selective breeding with larger kites

genetic engineering to modify specific genes

ecological succession due to random mutation

The presence of some similar structures in all vertebrates suggests that these vertebrates

may have an evolutionary relationship

evolved from different animals that appeared on Earth at the same time

all develop internally and rely on nutrients supplied by the mother

Burmese pythons are an invasive species in the Everglades National Park. In 2010, there was a rare "hard freeze," which residents hoped would eliminate these pests that were originally from very warm areas in Asia. Roughly 40% to 90% of the pythons were killed by the freeze event. Since not all of the pythons were killed during the freeze event, the members of the current large python population in the Everglades might differ from the members of the python population from before 2010. Pythons in their native habitat often eat a large animal and then do not feed again for weeks. In the Florida Everglades, food sources are often small mammals and birds. The current large python population in Florida can be described as a species that

has already successfully adapted to an unfamiliar environment through natural selection

will quickly die out because there are no appropriate food sources in their environment

will develop new digestive organs as needed to succeed in the Florida Everglades

has expanded only because small animals reproduce so quickly that they provide an unlimited food source

A scientist at a large natural history museum has a collection of fossils that were found throughout the world. Only a few of the fossils represent species that are still alive on Earth today. One reason for this is that

most of the species that have ever lived on Earth are extinct

most of the species that have ever lived on Earth are alive today.

fossils of only extinct species have been found

species alive today will not form any fossils for future discovery by scientists

Which population of organisms would be in greatest danger of becoming extinct?

A population of organisms having few variations living in an unstable environment.

A population of organisms having few variations living in a stable environment.

A population of organisms having many variations living in a stable environment.

A population of organisms having many variations living in an unstable environment.

In one variety of corn, the kernels turn red when exposed to sunlight. In the absence of sunlight, the kernels remain yellow. Based on this information, it can be concluded that the color of these corn kernels is due to the

effect of environment on gene expression

When exposed to ultraviolet (UV) light, human skin cells produce the protein melanin. This protein helps protect skin cells from damage caused by UV light. This is an example of

environmental factors affecting gene expression

a gene that cannot be passed on to offspring

natural selection producing a new species

sexual reproduction that will produce variation

Each winter in the Adirondack Mountains, some of the salt applied to roadways gets washed into lakes. The increase in salt levels in areas where frogs breed has resulted in more male frogs hatching than females. This is an example of

an abiotic factor affecting gene expression

asexual reproduction of male frogs

the normal expression of a gene for female frogs

loss of genetic information for male frogs

Traits are passed from parents to offspring. These traits are determined by

genes, located on chromosomes, found in the nucleus

chromosomes, located on genes, found in the nucleus

chromosomes, located on genes, found in the ribosomes

genes, located on chromosomes, found in the ribosomes

A mutation occurs in the liver cells of a certain field mouse. Which statement concerning the spread of this mutation through the mouse population is correct?

It will not spread because it is not in a sex cell.

It will spread because it is beneficial.

It will spread because it is a dominant gene.

It will not spread because it is a recessive gene.

Regents Review 2025 PART 1

9th Grade

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100 Qs

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Regents Review 2025 PART 1

Quiz

•

Biology

•

9th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-LS4-5, HS-LS2-6, HS-LS3-2

+31

Standards-aligned

Adam Cohen

Used 5+ times

FREE Resource

100 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Coral reefs are vital components of marine ecosystems. They provide shelter and nutrition to many organisms that live on or in them. Some coral reefs in the Pacific Ocean are heavily polluted with plastic objects that provide surfaces where disease-causing microbes are able to grow. If the amount of plastic present on coral reefs continues to increase, it is likely that the

coral will adapt to the presence of the plastic and thrive

microbes will adapt to living directly on the coral

algae that live on the reef will begin to decompose the dying coral

species dependent on the coral will be negatively impacted

Tags

NGSS.HS-LS2-6

NGSS.HS-LS2-7

NGSS.HS-LS4-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which long-term change could directly cause the other three?

pollution of air and water

increasing human population

scarcity of suitable animal habitats

depletion of resources

Tags

NGSS.HS-LS2-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which graph best illustrates the change in the human population over the past 2000 years?

Graph 1: Exponential increase

Graph 2: Fluctuating

Graph 3: Linear increase

Graph 4: Decrease

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Humans have an effect on ecosystems when they use native grasslands or forested areas for farming or urban use. One negative effect of these changes on the ecosystem is that there will be

less biodiversity

more homes

successful economic growth

increased food production

Tags

NGSS.HS-LS2-7

NGSS.HS-LS4-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The World Wildlife Federation's recent report indicated that there has been a 60% decline in the size of monitored wildlife populations in just over 40 years. The most likely factor contributing to this decline was

animals reproducing successfully

the destruction of many natural habitats

passing environmental protection laws

the introduction of native species into habitats

Tags

NGSS.HS-ESS3-4

NGSS.HS-LS2-7

NGSS.HS-LS4-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The graph below shows changes in human population numbers over time. A consequence of these changes is

an increase in the numbers and kinds of organisms worldwide

a decrease in the availability of natural resources

a decrease in deforestation due to technological improvements

an increase in biosphere stability

Tags

NGSS.HS-ESS3-1

NGSS.HS-LS2-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Ringworm is a skin infection common among school-aged children. Although the name suggests that a worm causes the disease, it is actually caused by a fungus that lives and feeds on the dead outer layer of the skin. The relationship between ringworm and humans can be described as

predator/prey

predator/host

parasite/prey

parasite/host

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