Question 1

What are the three criteria an organism must meet to be considered an animal?

Accepted Answer

Energy from food (not sunlight)
Ability to move 
Made of multiple eukaryotic cells

Question 2

What is a eukaryotic cell?

Accepted Answer

A cell that has membrane bound organelles

Question 3

Many plants have eukaryotic cells.  What substance is made by eukaryotic cells in animals that is not made by plants?

Accepted Answer

Collagen proteins

Question 4

Where is collagen found in animals?

Accepted Answer

Skin, tendons, bones, ligaments, and tissues that surround the organs.

Question 5

Fungi are made of multiple eukaryotic cells, and they get energy from food. Why are fungi not considered animals?

Accepted Answer

Their cells do not produce collagen

Question 6

Protists are made of eukaryotic cells and they can move. Why are protists not considered animals?

Accepted Answer

They are unicellular

Question 7

Animals that have spinal cords and brains, produce milk, and have hair.

Accepted Answer

Mammals

Question 8

Humans are

Accepted Answer

Mammals

Question 9

Animals with _________  ________ are considered the most complex forms of life on Earth

Accepted Answer

Spinal cords

Question 10

Part of the central nervous system in which in which sensory information from the outside world is sent to the brain

Accepted Answer

Spinal cords

Question 11

Spinal cords also allow
for

Accepted Answer

Complex motion and reactions.

Question 12

Another unique feature of mammals is
their ability to produce

Accepted Answer

milk from mammary glands  to nourish young.

Question 13

Mammals are viviparous,
meaning they

Accepted Answer

give birth to live young.

Question 14

Monotremes like the _____________ and echidna are exceptions because they are mammals that lay eggs.

Accepted Answer

platypus

Question 15

Because all mammals evolved from
a common ancestor, they all have three

Accepted Answer

middle ear bones.

Question 16

These three three middle ear bones allow mammals to transmit sound and vibrations into messages in the

Accepted Answer

Brain

Question 17

Mammals have been found in almost every part of the world. Some, such as___________ live their whole lives in the water.

Accepted Answer

Whales

Question 18

_____________  are an example of mammals that are primarily airborne,

Accepted Answer

Bats

Question 19

The majority of animals are found on

Accepted Answer

Land

Question 20

Reptiles, fish, amphibians, and birds are all

Accepted Answer

Animals

Question 21

Reptiles, fish, amphibians, and birds differ from mammals because they are

Accepted Answer

Oviparous

Question 22

___________ means that they reproduce by laying eggs.

Accepted Answer

Oviparous

Question 23

Some animals, like rattlesnakes, give birth to live offspring that developed inside eggs and hatched inside the mother. This is called

Accepted Answer

Ovoviviparous

Question 24

An example of a bird that cannot fly

Accepted Answer

Penguin

Question 25

Reptiles can be found mostly on land, but there are some reptiles, such as sea snakes and _____________ that are adapted to living mostly in water and occasionally come onto land.

Accepted Answer

Crocodiles

Question 26

_________ live their whole life underwater.

Accepted Answer

Fish

Question 27

________  include animals that are fully aquatic, such as Axolotls
(Ambystoma mexicanum), as well as semi-terrestrial species, such as frogs.

Accepted Answer

Amphibians

Question 28

Regardless of where they live, animals  must all breathe

Accepted Answer

Oxygen

Question 29

With few exceptions, most all fish have _______ that allow them to breathe underwater.

Accepted Answer

Gills

Question 30

The mudskipper (Periophthalmus gracilis) is able to survive in muddy environments using modified gill structures
to obtain oxygen from both the __________ and the water.

Accepted Answer

Air

Question 31

_____________________can breathe through their skin in addition to using their lungs, making them well-adapted to living in wet environments.

Accepted Answer

Amphibians

Question 32

______________   include insects and arachnids,

Accepted Answer

Arthropods

Question 33

The label _____________ refers to most species of bugs that have three body segments and six legs.

Accepted Answer

Insects

Question 34

_______________ include spiders, mites, ticks, and scorpions, which all have two body segments and a total of eight legs.

Accepted Answer

Arachnids

Question 35

While________________ lack a spinal cord, they have an open circulatory system that circulates a substance called hemolymph around their organs to oxygenate them.

Accepted Answer

Arthropods

Question 36

Some insects have developed intricate social groups. _______________ and ant colonies are comprised of thousands of individuals, each with specific roles to maintain a systematic flow of raising young and making food.

Accepted Answer

Honeybees

Question 37

Grasshoppers and wasps are examples of __________

Accepted Answer

Arthropods

Question 38

Other arthropods, such as grasshoppers and some species of wasps, are primarily ______________  and spend their entire life
alone, only interacting with others to mate.

Accepted Answer

Solitary

Question 39

_____________ contain no internal skeleton and are instead supported by an outer skeleton called an exoskeleton.

Accepted Answer

Arthropods

Question 40

Some arthropods, like mites that live on other animals, are too small to be seen with the naked eye and are

Accepted Answer

microscopic.

Question 41

The Goliath birdeater (Theraphosa blondi) is a tarantula found in South America that is known to catch and kill _________  as its primary food source.

Accepted Answer

birds

Question 42

________________make up most of life on earth. For every single human being, there is estimated to be one billion arthropods alive
at any given moment.

Accepted Answer

Arthropods

Question 43

Some animals have characteristics that vary somewhat from the three criteria defining animals. For example, there are some animals that appear plant-like during some _____________ in their lives.

Accepted Answer

stages

Question 44

____________________   resemble plants but have a complex life cycle that involves a larval phase during which they swim freely before settling on rocky formations underwater.

Accepted Answer

Sea sponges

Question 45

Microscopic animals such as _________________  look like insects but
belong to their own group of animals.

Accepted Answer

Tardigrades

Question 46

Sea slugs are animals, but there are some species that use _______________  to obtain their energy from the sun.

Accepted Answer

photosynthesis

Question 47

Scientists classify animals more specifically using a variety of methods to describe how animals are _____________ to one another.

Accepted Answer

Question 48

The term ______________ refers to all the ways animals interact with other organisms, internal signals, and the physical environment.

Accepted Answer

Behavior

Question 49

_____________ allows animals to survive and thrive in their environments.

Accepted Answer

Behavior

Question 50

All living organisms, including__________  exhibit behavior to some degree but the behavior of animals is considered the most complex form

Accepted Answer

Plants

Science '2627

To study for Science 2026-2027 Academic Pentathlon!

Question	Answer
What are the three criteria an organism must meet to be considered an animal?	Energy from food (not sunlight) Ability to move Made of multiple eukaryotic cells
What is a eukaryotic cell?	A cell that has membrane bound organelles
Many plants have eukaryotic cells. What substance is made by eukaryotic cells in animals that is not made by plants?	Collagen proteins
Where is collagen found in animals?	Skin, tendons, bones, ligaments, and tissues that surround the organs.
Fungi are made of multiple eukaryotic cells, and they get energy from food. Why are fungi not considered animals?	Their cells do not produce collagen
Protists are made of eukaryotic cells and they can move. Why are protists not considered animals?	They are unicellular
Animals that have spinal cords and brains, produce milk, and have hair.	Mammals
Humans are	Mammals
Animals with _________ ________ are considered the most complex forms of life on Earth	Spinal cords
Part of the central nervous system in which in which sensory information from the outside world is sent to the brain	Spinal cords
Spinal cords also allow for	Complex motion and reactions.
Another unique feature of mammals is their ability to produce	milk from mammary glands to nourish young.
Mammals are viviparous, meaning they	give birth to live young.
Monotremes like the _____________ and echidna are exceptions because they are mammals that lay eggs.	platypus
Because all mammals evolved from a common ancestor, they all have three	middle ear bones.
These three three middle ear bones allow mammals to transmit sound and vibrations into messages in the	Brain
Mammals have been found in almost every part of the world. Some, such as___________ live their whole lives in the water.	Whales
_____________ are an example of mammals that are primarily airborne,	Bats
The majority of animals are found on	Land
Reptiles, fish, amphibians, and birds are all	Animals
Reptiles, fish, amphibians, and birds differ from mammals because they are	Oviparous
___________ means that they reproduce by laying eggs.	Oviparous
Some animals, like rattlesnakes, give birth to live offspring that developed inside eggs and hatched inside the mother. This is called	Ovoviviparous
An example of a bird that cannot fly	Penguin
Reptiles can be found mostly on land, but there are some reptiles, such as sea snakes and _____________ that are adapted to living mostly in water and occasionally come onto land.	Crocodiles
_________ live their whole life underwater.	Fish
________ include animals that are fully aquatic, such as Axolotls (Ambystoma mexicanum), as well as semi-terrestrial species, such as frogs.	Amphibians
Regardless of where they live, animals must all breathe	Oxygen
With few exceptions, most all fish have _______ that allow them to breathe underwater.	Gills
The mudskipper (Periophthalmus gracilis) is able to survive in muddy environments using modified gill structures to obtain oxygen from both the __________ and the water.	Air
_____________________can breathe through their skin in addition to using their lungs, making them well-adapted to living in wet environments.	Amphibians
______________ include insects and arachnids,	Arthropods
The label _____________ refers to most species of bugs that have three body segments and six legs.	Insects
_______________ include spiders, mites, ticks, and scorpions, which all have two body segments and a total of eight legs.	Arachnids
While________________ lack a spinal cord, they have an open circulatory system that circulates a substance called hemolymph around their organs to oxygenate them.	Arthropods
Some insects have developed intricate social groups. _______________ and ant colonies are comprised of thousands of individuals, each with specific roles to maintain a systematic flow of raising young and making food.	Honeybees
Grasshoppers and wasps are examples of __________	Arthropods
Other arthropods, such as grasshoppers and some species of wasps, are primarily ______________ and spend their entire life alone, only interacting with others to mate.	Solitary
_____________ contain no internal skeleton and are instead supported by an outer skeleton called an exoskeleton.	Arthropods
Some arthropods, like mites that live on other animals, are too small to be seen with the naked eye and are	microscopic.
The Goliath birdeater (Theraphosa blondi) is a tarantula found in South America that is known to catch and kill _________ as its primary food source.	birds
________________make up most of life on earth. For every single human being, there is estimated to be one billion arthropods alive at any given moment.	Arthropods
Some animals have characteristics that vary somewhat from the three criteria defining animals. For example, there are some animals that appear plant-like during some _____________ in their lives.	stages
____________________ resemble plants but have a complex life cycle that involves a larval phase during which they swim freely before settling on rocky formations underwater.	Sea sponges
Microscopic animals such as _________________ look like insects but belong to their own group of animals.	Tardigrades
Sea slugs are animals, but there are some species that use _______________ to obtain their energy from the sun.	photosynthesis
Scientists classify animals more specifically using a variety of methods to describe how animals are _____________ to one another.	Related
The term ______________ refers to all the ways animals interact with other organisms, internal signals, and the physical environment.	Behavior
_____________ allows animals to survive and thrive in their environments.	Behavior
All living organisms, including__________ exhibit behavior to some degree but the behavior of animals is considered the most complex form	Plants

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