When two strands of DNA line up, adenine always pairs up with . guanine

phosphate

thymine

cytosine

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

How many neutrons does plutonium -196 with an atomic number of 78.

In which item is energy stored in the form of gravitational potential energy? a. a slice of bread b. a compressed spring c. an apple on a tree d. a stretched bow string