The largest one on the moon is about 700 miles in diameter; there are billions at least 1 foot wide
The Graafian follicles of these glands contain the female reproductive cells
The screw & the wedge are adaptations of this type of simple machine
Two 9-volt batteries in a series circuit produce this many volts of electromotive force
In 1970 David Baltimore proved that this nucleic acid could transmit information to DNA
In plants & invertebrates, this outermost layer of protection is usually just one cell thick
It's any tissue that contracts & relaxes, causing movement of the limbs & other body parts
Architectural term for the minimal stimulus that starts a nerve impulse, like pain
It's the process by which an organism or cell takes in oxygen & expels carbon dioxide
How loud you're playing your Aerosmith album is indicated by this number