Slice me in half, I’ll have a twin.
I’ll mix things up, using my skin.
Bury me alive, and I won’t die.
I know when it’s light, but have no eyes.
Who am I?
Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. It only takes a minute to sign up.
Sign up to join this communityYou are
A worm
Slice me in half, I’ll have a twin.
If you cut one in half it looks like you have two worms.
I’ll mix things up, using my skin.
In travelling through the soil, they churn it as they go (due to their slightly "ribbed" bodies).
Bury me alive, and I won’t die.
They live underground.
I know when it’s light, but have no eyes.
Worms have light-sensitive cells which help them tell the difference between light and dark.
Could it be...
A seed / plant
Slice me in half, I’ll have a twin.
Most seeds come in two 'halves', and can easily be split apart down that line. (pretty sure there is some species of seeds that can live when cut in two.)
I’ll mix things up, using my skin.
Weird things happen inside that seed as it turns into a plant... On the outside, it starts to grow roots, and interact with the soil.
Bury me alive, and I won’t die.
You can bury a seed in the ground and it lives perfectly well.
I know when it’s light, but have no eyes.
They can't see, being a plant, but it can definitely tell when the sun is out (certain flowers only bloom at certain times of the day, a plant will grow in the direction of light, etc.)
You are
A potato
Slice me in half, I’ll have a twin.
Potatoes can be cut in half, and each half can grow a new plant
I’ll mix things up, using my skin.
Many recipes for filled potato skins
Bury me alive, and I won’t die.
Bury a potato, and it will grow
I know when it’s light, but have no eyes.
Potatoes turn green in the light.
You are
an electricity cable
Slice me in half, I’ll have a twin.
some electricity cables contain two wires
I’ll mix things up, using my skin.
if you want to join two cables, you remove their skin
Bury me alive, and I won’t die.
A live cable is a cable with electricity flowing in it. If it is underground it will still let electricity flow
I know when it’s light, but have no eyes.
electricity is used for making light
You are
a sea star
Slice me in half, I’ll have a twin.
sea stars have the ability to regenerate
I’ll mix things up, using my skin.
mixing the sand using its skin??
Bury me alive, and I won’t die.
you can bury it on the sand and it won't die.
I know when it’s light, but have no eyes.
they can't really see but can sense light
It could be a
Cell
Slice me in half, I’ll have a twin.
Cells when split are 2
I’ll mix things up, using my skin.
Some cells when they move mix around substances around them with their membrane/wall
Bury me alive, and I won’t die.
If you bury a cell, it still lives
I know when it’s light, but have no eyes
Photo receptive cells
You are
Slice me in half, I’ll have a twin.
Planarians are known for their regeneration capabilities
I’ll mix things up, using my skin.
Bury me alive, and I won’t die.
Some species of Planaria are terrestrial and can be found digging in dirt.
I know when it’s light, but have no eyes.
Planaria have photoreceptors which can detect light.
You could be
Baker's yeast
Slice me in half, I’ll have a twin.
Yeast is a clump of bacteria that can be split pretty often
I’ll mix things up, using my skin.
The bacteria on the outside react with the surrounding sugar, produce CO2 and make the dough grow.
Bury me alive, and I won’t die.
You can bury it in dough just fine.
I know when it’s light, but have no eyes.
Yeast is sensitive to light and will die if exposed for too long.
You are
A line.
Slice me in half, I'll have a twin.
If you slice a line in half, you will have two lines with equal lengths — it was never mentioned that it must be sliced into two arbitrary parts. Twins!
I'll mix things up, using my skin.
You can draw all kinds of shapes and pictures using lines.
Bury me alive, and I won't die.
Bury lines in colour, and it might even look more alive than what it was. (I assume that the lines are alive until they are rubbed out.)
I know when it's light, but I have no eyes.
Not too sure about this one, but possibly refers to the colour of the surface on which the lines have been drawn on — it could be light or dark.
Who am I?
A line is not a who, which is what I think degrades my answer. Nice riddle, though!
$$\stackrel{\bullet\,\bullet}{\smile}$$