network of veins on leaf are called as _______________________?

how does the elodea leaf release oxygen into the water?

Is it true that UFO comes from a planet called Terra where all of stuffs there using high technology compared to what we have...

What do you call aperson who studies birds is there even such thing as that like a birdyologist...I know its stupid but I can...

YEah... uhmm I heard that they are/were making something Called " the large hydron colider" It this thing I guess thats going...

I have heard that it will hit us. But im not aware of the whole story. Can someone please enlighten me :)

what are huge rocks found on the mountains and hills called

Did anyone else know that there was a 13th Zodiac in the early years?? Its was called Orpheous the Snake Bearer... I think t...

If there was an earthquake on mars would it be called a marsquake

Scienc-y question for ya'll. My mind blanked and I forgot what they're called :P

I'm not launching anything in particular so I can't call it "whatever I am launching-pult"