Question 1

What is the primary function of the digestive system?

Accepted Answer

Break down food and absorb nutrients

Answer

Pump blood through the body

Answer

Produce hormones

Answer

Filter waste from blood

Question 2

Which organ connects the mouth to the stomach?

Accepted Answer

Esophagus

Answer

Pancreas

Answer

Small intestine

Answer

Large intestine

Question 3

Where do most nutrients get absorbed?

Accepted Answer

Small intestine

Answer

Stomach

Answer

Large intestine

Answer

Mouth

Question 4

What protects the airway during swallowing?

Accepted Answer

Epiglottis

Answer

Tongue

Answer

Uvula

Answer

Teeth

Question 5

What is the role of the large intestine?

Accepted Answer

Absorbing water and forming feces

Answer

Breaking down fats

Answer

Digestion of proteins

Answer

Producing digestive enzymes

Question 6

Which organ secretes digestive enzymes into the small intestine?

Accepted Answer

Pancreas

Answer

Kidneys

Answer

Heart

Answer

Lungs

Question 7

Food in the stomach is mixed with acids to turn it into what?

Accepted Answer

Chyme

Answer

Waste

Answer

Bolus

Answer

Bile

Question 8

Which organ produces bile?

Accepted Answer

Liver

Answer

Esophagus

Answer

Gallbladder

Answer

Pancreas

Question 9

Which part of the digestive system is responsible for breaking down food with teeth and saliva?

Accepted Answer

Mouth

Answer

Stomach

Answer

Small intestine

Answer

Large intestine

Question 10

What is the main function of saliva in the digestive process?

Accepted Answer

To help break down food and make it easier to swallow

Answer

To store food

Answer

To protect against diseases

Answer

To absorb nutrients

Question 11

What is the main function of the respiratory system?

Accepted Answer

Exchange gases (oxygen and carbon dioxide)

Answer

Digest food

Answer

Produce hormones

Answer

Circulate blood

Question 12

What muscle helps the lungs expand and contract?

Accepted Answer

Diaphragm

Answer

Liver

Answer

Stomach

Answer

Heart

Question 13

Which tiny structures increase the surface area inside the lungs?

Accepted Answer

Alveoli

Answer

Bronchi

Answer

Diaphragm

Answer

Trachea

Question 14

Which part filters and warms air before it enters the lungs?

Accepted Answer

Nose / nasal passages

Answer

Stomach

Answer

Large intestine

Answer

Mouth

Question 15

What happens when you inhale?

Accepted Answer

Diaphragm moves down and air enters

Answer

Air leaves the body

Answer

Lungs collapse

Answer

Diaphragm moves up

Question 16

What happens when air reaches the alveoli?

Accepted Answer

Oxygen moves into blood, carbon dioxide moves out

Answer

Food digestion happens

Answer

Air is pushed back

Answer

Water is absorbed

Question 17

Which structure carries air into the lungs from the trachea?

Accepted Answer

Bronchi

Answer

Alveoli

Answer

Bronchioles

Answer

Esophagus

Question 18

Why is breathing important for cells?

Accepted Answer

To get oxygen for energy and remove carbon dioxide

Answer

To produce sounds

Answer

To get rid of heat

Answer

To store food

Question 19

Which is NOT part of the respiratory system?

Accepted Answer

Kidney

Answer

Bronchi

Answer

Lungs

Answer

Trachea

Question 20

What is the primary function of the lungs?

Accepted Answer

To facilitate gas exchange

Answer

To filter food

Answer

To pump blood

Answer

To produce hormones

Question 21

What is the primary function of the reproductive system?

Accepted Answer

Create new organisms / offspring

Answer

Produce digestive enzymes

Answer

Pump blood

Answer

Filter wastes

Question 22

Which part of the female reproductive system produces eggs?

Accepted Answer

Ovaries

Answer

Testes

Answer

Prostate gland

Answer

Vas deferens

Question 23

Where does fertilization normally occur?

Accepted Answer

Oviduct / Fallopian tube

Answer

Vagina

Answer

Uterus

Answer

Ovary

Question 24

Which structure in males stores sperm until ejaculation?

Accepted Answer

Epididymis

Answer

Ovary

Answer

Fallopian tubes

Answer

Urethra

Question 25

The uterus is the organ where:

Accepted Answer

Baby develops during pregnancy

Answer

Menstruation does not happen

Answer

Eggs are stored

Answer

Sperm is produced

Question 26

What is menstruation?

Accepted Answer

Release of mature egg and shedding of uterine lining

Answer

Digesting food

Answer

Production of sperm

Answer

Growth of embryo

Question 27

Which organ carries urine and sperm in males?

Accepted Answer

Urethra

Answer

Fallopian tube

Answer

Oviduct

Answer

Ovary

Question 28

Which hormone in females regulates the menstrual cycle and supports pregnancy?

Accepted Answer

Estrogen / Progesterone

Answer

Insulin

Answer

Adrenaline

Answer

Testosterone

Question 29

What is the main purpose of the male reproductive system?

Accepted Answer

Produce sperm

Answer

Produce eggs

Answer

Support pregnancy

Answer

Store urine

Question 30

What is the function of the placenta during pregnancy?

Accepted Answer

Provide nutrients and oxygen to the developing baby

Answer

Generate energy for the mother

Answer

Produce hormones

Answer

Remove waste from the mother

Question 31

Which part of a flowering plant becomes fruit?

Accepted Answer

Ovary (after fertilization)

Answer

Stem

Answer

Leaf

Answer

Roots

Question 32

What is the main difference between vascular and non-vascular plants?

Accepted Answer

Whether they have vessels (tubes) for transporting water and nutrients

Answer

Whether they have flowers or not

Answer

Whether they can walk

Answer

Whether they produce seeds or not

Question 33

What structure in plants bears seeds?

Accepted Answer

Flower

Answer

Stem

Answer

Root

Answer

Leaf

Question 34

What are non-vascular plants?

Accepted Answer

Plants without vessels for transport (no xylem/phloem)

Answer

Plants with flowers

Answer

Plants that have seeds

Answer

Plants that are always tall

Question 35

Which of these is a vascular plant?

Accepted Answer

Ferns

Answer

Moss

Answer

Algae

Answer

Liverworts

Question 36

Which plant part carries water upward from roots?

Accepted Answer

Stem (xylem)

Answer

Fruit

Answer

Flowers

Answer

Leaves

Question 37

Which plant part is usually the site of photosynthesis?

Accepted Answer

Leaves

Answer

Stem

Answer

Roots

Answer

Seeds

Question 38

How do plants reproduce?

Accepted Answer

By seeds or by vegetative means (cuttings)

Answer

Only by vegetative parts

Answer

By walking

Answer

Only by seeds

Question 39

What category do plants fall under?

Accepted Answer

Plants

Answer

Animals

Answer

Fungi

Answer

Bacteria

Question 40

What is classification in biology?

Accepted Answer

Grouping organisms based on similarities and differences

Answer

Photosynthesis

Answer

Destroying weeds

Answer

Cooking plants

Question 41

What distinguishes vertebrates from invertebrates?

Accepted Answer

Having bones / vertebral column

Answer

Laying eggs

Answer

Being large in size

Answer

Having feathers

Question 42

Which animal classification group has warm-blooded animals?

Accepted Answer

Birds and mammals

Answer

Reptiles only

Answer

Fish

Answer

Insects

Question 43

Which of these is a vertebrate?

Accepted Answer

Frog

Answer

Jellyfish

Answer

Earthworm

Answer

Starfish

Question 44

What is a characteristic of invertebrate animals?

Accepted Answer

No backbone

Answer

Wings

Answer

Ability to produce milk

Answer

Backbone and skull

Question 45

Which microorganism can be harmful (pathogenic)?

Accepted Answer

Some bacteria

Answer

All plants

Answer

All fungi

Answer

Birds

Question 46

What is a simple way scientists classify animals first?

Accepted Answer

By whether they have a backbone (vertebrates) or not (invertebrates)

Answer

By their speed

Answer

By how pretty they are

Answer

By their favorite food

Question 47

Which of the following is a beneficial microorganism?

Accepted Answer

Yeast used in baking

Answer

Harmful bacteria

Answer

Parasite

Answer

Pathogenic virus

Question 48

How are animals commonly classified?

Accepted Answer

By diet, habitat, body structure (vertebrates / invertebrates)

Answer

By color only

Answer

By name only

Answer

By whether they can walk

Question 49

What is an animal?

Accepted Answer

An organism that moves and consumes other organisms for energy

Answer

An organism that performs photosynthesis

Answer

An organism that is always single-celled

Answer

An organism without a nucleus

Question 50

Which of these is a characteristic of mammals?

Accepted Answer

They have hair or fur and produce milk

Answer

They lay eggs only

Answer

They have scales

Answer

They can always fly

Question 51

What are the two main types of animal reproduction?

Accepted Answer

Sexual and asexual reproduction

Answer

Physical and chemical reproduction

Answer

Cellular and organ reproduction

Answer

External and internal digestion

Question 52

Which animals lay eggs?

Accepted Answer

Oviparous animals

Answer

Viviparous animals

Answer

Ovoviviparous animals

Answer

Mammals

Question 53

What do we call animals that give birth to live young?

Accepted Answer

Viviparous

Answer

Metamorphic

Answer

Amphibians

Answer

Oviparous

Question 54

Which of the following is an example of complete metamorphosis?

Accepted Answer

Butterfly

Answer

Frog

Answer

Dog

Answer

Chicken

Question 55

What is the first stage in the life cycle of most animals?

Accepted Answer

Egg

Answer

Larva

Answer

Adult

Answer

Pupa

Question 56

Which of the following shows incomplete metamorphosis?

Accepted Answer

Grasshopper

Answer

Mosquito

Answer

Butterfly

Answer

Beetle

Question 57

What happens during metamorphosis?

Accepted Answer

An animal changes in form as it grows

Answer

The animal reproduces

Answer

The animal migrates

Answer

Food is digested in the body

Question 58

Which animal undergoes complete metamorphosis?

Accepted Answer

Butterfly

Answer

Cockroach

Answer

Grasshopper

Answer

Dragonfly

Question 59

What is a key characteristic of ovoviviparous animals?

Accepted Answer

They hatch eggs inside their bodies before giving birth.

Answer

They reproduce asexually.

Answer

They lay eggs outside their bodies.

Answer

They give birth to fully developed young.

Question 60

Which of the following stages is found in complete metamorphosis?

Accepted Answer

Pupa

Answer

Larva

Answer

Nymph

Answer

Adult

Question 61

What specialized structure helps cactus survive in the desert?

Accepted Answer

Spines

Answer

Broad leaves

Answer

Large flowers

Answer

Soft stems

Question 62

What do thorns help a plant do?

Accepted Answer

Protect against animals

Answer

Absorb water

Answer

Produce flowers

Answer

Make food

Question 63

Which plant has thick leaves that store water?

Accepted Answer

Aloe vera

Answer

Mango

Answer

Grass

Answer

Coconut

Question 64

Tendrils in some plants, like peas, are used for:

Accepted Answer

Climbing and support

Answer

Storing food

Answer

Protection

Answer

Reproduction

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