Think you know all there is to know about biology? Test your knowledge with these biology riddles and see how you fare.
What can you catch but not throw?See answer
What is long, pink and wet and is rude to pull out in front of people?See answer
If you break me, I do not stop working. If you touch me, I may be snared. If you lose me, nothing will matter.See answer
What do your eyes do when you see a tough geometry problem?See answer
I'm a king that speaks for my country
At birth I protected by no one
As I grow my father gives me 2 soldiers to protect me
As I get matured many more are given to me
And at my full age my father gives me 32 white soldiers to guard me and protect me
What am I?
What must be in the oven yet cannot be baked?
Grows in the heat yet shuns the light of day?
What sinks in water but rises with air?
Looks like skin, but is fine as hair?
I am pinched by grandmas. What am I?See answer
A natural tattoo on babies.See answer
What body part is pronounced as one letter but written with three, only two different letters are used?See answer
It's anything but amusing when this body part gets hit.See answer
How many biologists does it take to change a light bulb?See answer
I fall with the waves, rise with the tide, and drift with the current alongside. What am I?See answer
Consuming food would be pretty tough without these chompers.See answer
I cannot be bought, cannot be sold, even if I'm sometimes made of gold. What am I?See answer
What do you call the leader of a biology gang?See answer
Causes dancing in children when it fills up.See answer
Some adults still use these to count.See answer
A red drum which sounds without being touched, and grows silent, when it is touched.See answer
What tastes better than it smells?See answer
Where jewelry pierces your head.See answer
Thirty white horses on a red hill,
First they champ,
Then they stamp,
Then they stand still.
What bone has a sense of humor?See answer
I am the only organ that named myself. What am I?See answer
I am expelled from you orally with a sound. What am I?See answer
I am a window, I am a lamp, I am clouded, I am shining, I am colored and set in white, I fill with water and overflow. I say much, but I have no words.See answer
Why was the scuba diver failing biology?See answer
It covers you, you lose it every day and you'd die without it.See answer
This is a shape and a symbol that we literally cannot live without. What is it?See answer
I'm the source of all emotion, but I'm caged in a white prison.See answer
A small hill with seven holes.See answer
I'm not man's best friend, I'm their enemy,
I can mark your end, yet you do not see me,
I am very small, but very tough,
If you have me, then you have it rough.
No head has he but he wears a hat. No feet has he but he stands up straight. On him perhaps a fairy sat, weaving a spell one evening late!See answer
I am free the first time and second time, but the third time is going to cost you money. What am I?See answer
I am the reason you run. I am the reason you scream. I am the cause of your pain. I am a cage from which you will never be free.See answer
I am the state when a person is holding a person inside. What am I?See answer
The thinkers usually hold this body part.See answer
What can you always count on?See answer
A hole leading in, a hole leading out, we connect to a cavern that is slimy all throughout. What are we?See answer
I've been argued on my colour. Without me you'll die. So many attempts on your life use me, so make sure you have many of my "White" friends. What am I?See answer
What can you hold in your left hand and not in your right?See answer
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.See answer
What did the femur say to the patella?See answer
I was not born, but I am here. I have no name, but I am given many. I was made by science and life. What am I?See answer
What month do people sleep the least?See answer
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.See answer
I grow for a surface, even if you cut me. I continue to grow even after death. What am I?See answer
I see what you see, feel what you feel, and hear what you hear. I know all of your moves before you make them. I even know the moves you didn't make. What am I?See answer
I am very important, but often overlooked. What am I?See answer
I'm really blue, but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt, but I'm good for you. What am I?See answer
I am constantly overlooked by everyone but everyone has me. What am I?See answer
I am needed for most animals and hardcover books. What am I?See answer
How is a dog and a marine biologist alike?See answer
Timid or weak people are said to not have these.See answer
What is round, has a twin, and sees more than most?See answer
Without this, eating food and Steven Spielberg's career would be very different.See answer
What did one cell say to his sister cell when she stepped in his toe?See answer
A precious fluid, thicker than water. What is it?See answer
Of these everyone has ten, part of two wholes at the arms end. What are they?See answer
I run cold and hot, I look blue but I am red. What am I?See answer
When a doctor hits you with a hammer he is testing this.See answer
I'm under your face,
I'm outside your mind;
A biological case,
Pressure brings pain sometimes.
What am I?
I am a man without bones, without blood, without life. My flesh is white, cold and shrinking. What am I?See answer
What smells the most in the kitchen?See answer
What dentists battle on a daily basis.See answer
Only two backbones and thousands of ribs.See answer
Without it sounds would not be there, But through it music's ring is clear. It is a symbol for your woe, But only if your name's van Gogh.See answer
Humans have two that shrink in the light and expand in the dark.See answer
When set loose, I fly away. Never so cursed, as when I go astray. What am I?See answer
What has a bottom right at the top?See answer
What does DNA stand for?See answer
Hurts when it breaks and if it stops, you are dead.See answer
Within, I clean all that is bad and is old.
I make juice that's the color of gold.
Should I die, a filter machine would you need assembled to replace me and beans I resemble.
They're actually great swimmers now, but later they will become excellent hoppers.See answer
A device for finding furniture in the dark.See answer
What kind of tree can you carry in your hand?See answer
Break me but I'll continue to work, touch me and maybe I'll stay with you forever. What am I?See answer
Found at the back of a book or in an abdomen. What am I?See answer
They are many and one, they wave and they drum. Used to cover a state, they go with you everywhere.See answer
What goes inside boots and outside shoes?See answer
When liquid splashes me, none seeps through.
When I am moved a lot, liquid I spew.
When I am hit, color I change.
And color, I come in quite a range.
What I cover is very complex,
And I am very easy to flex.
I've got a beautiful, beautiful hall all walled in red velvet, with all white armchairs made of bone, and in the middle a woman dances.See answer
What is given but kept by the giver?See answer
My rings are not worth much, but they do tell my age. What am I?See answer
How does Juliet maintain a constant body temperature?See answer
I do not breathe, but I run and jump. I do not eat, but I swim and stretch. I do not drink, but I sleep and stand. I do not think, but I grow and play. I do not see, but you see me everyday.See answer
We are two brothers on opposite sides of the road, but we never see each other. Who are we?See answer
I am one of many,
You forget I'm here, but I'm just below.
Without me, you'd surely topple,
Go ahead, what am I?
I transfer oxygen from the atmosphere to your blood. What am I?See answer
Where humans breathe liquid.See answer
Keep doing me to avoid lens dryness. What am I?See answer
Locked up inside you and yet they can steal it from you.See answer
I am pronounced as one letter, written with three. I come in blue, black, brown, or grey. Reverse me and I read the same either way. What am I?See answer
I am ten little beans your look at everyday. What am I?See answer
Two little holes in the side of a hill. Just as you come to the cherry-red mill.See answer
Everybody has some. You can lose some, you can gain some. But you cannot live without it. What am I?See answer
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places distant from them.See answer
Used left or right, I get to travel over cobblestone or gravel.
Used up, I vie for sweet success, used down, I cause men great duress.
I can run but not walk. Wherever I go, thought follows close behind. What am I?See answer
I am the minerals vital for your good health. What am I?See answer
A hole in a pole. Though I fill a hole in white, I'm used more by the day and less by the night. What am I?See answer
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Download a printable version of these riddles.Biology Riddles.pdf