How is a food chain different from a food web?

A food web shows multiple interconnected food chains.

A food web only includes plants, while a food chain includes animals

A food chain and a food web are the same thing

A food chain is more complex than a food web

How do animals get their energy?

From absorbing sunlight through their skin

By drinking water from rivers and lakes

Through the process of photosynthesis

What do the arrows in a food chain represent?

Direction of migration of animals

Match the type of symbiosis with the correct example.

Honey bees gather food from flowers and distribute pollen between plants

Remora attach to sharks and feed on uneaten food scraps

An ecosystem in homeostasis is

in a state of balance and stability

in a state of chaos and instability

constantly changing and unpredictable

completely devoid of any life or activity

A keystone species is

a species other species in an ecosystem largely depend upon

a species that has no effect on its environment

a species that is only found in one specific habitat

a species that is not important for the ecosystem

Which of the following are density INDEPENDENT limiting factors?

Increased CO2 in the air leads to more CO2 dissolved in water

Elk and deer compete for grasses

A parasite spreads between prairie dogs

Which of the following are density DEPENDENT limiting factors?

Elk and deer compete for grasses

A parasite spreads between prairie dogs

Increased CO2 in the air leads to more CO2 dissolved in water

The blue line on this graph represents the urchin population size. Is this population currently in homeostasis ?

No, because the urchin population is continuing to grow

Yes, because the urchin population is staying the same

Oxygen bubbles from an aquatic plant are being measured. If more oxygen bubbles are being released by the plant, then

more photosynthesis is occurring

more cellular respiration is occurring

less photosynthesis is occurring

Which of the following are true for MITOCHONDRIA?

Found in BOTH plant and animal cells

Cellular respiration occurs here

Found in plant cells but not animal cells

Which of the following are true for CHLOROPLASTS?

Found in plant cells but not animal cells

Found in BOTH plant and animal cells

Cellular respiration occurs here

2025 Biology 1st Semester Final Exam Review

Authored by Amy Middaugh

Biology

9th Grade

62 Questions

NGSS covered

Used 77+ times

2025 Biology 1st Semester Final Exam Review

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Content View

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The variety of life within an ecosystem is called

monoculture

homogeneity

uniformity

biodiversity

Tags

NGSS.MS-LS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A species specialized role in an ecosystem, including what they eat and where they live is called a(n)

niche

environmental role

habitat

ecosystem position

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The area in which an organism lives is called a(n)

habitat

zone

environment

territory

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Each species must have their own niche to prevent

overpopulation

cooperation

extinction

competition

Tags

NGSS.MS-LS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The nonliving parts of an ecosystem are called _______________ factors.

abiotic

organic

living

biotic

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Grass

biotic

abiotic

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Earthworms

biotic

abiotic

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-1

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2025 Biology 1st Semester Final Exam Review

The variety of life within an ecosystem is called

A species specialized role in an ecosystem, including what they eat and where they live is called a(n)

The area in which an organism lives is called a(n)

Each species must have their own niche to prevent

The nonliving parts of an ecosystem are called _______________ factors.

Grass

Earthworms

Water

Soil

Which organism in the food chain is the producer?

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