What makes water a polar molecule?

a. the liquid nature of water b. the equal forces between oxygen and hydrogen c. the ionic bond between oxygen and hydrogen d. the uneven bend in the bond between oxygen and hydrogen

D. The uneven bend in the bond between oxygen and hydrogen

Explanation:

A polar covalent bond is defined as the bond which is formed when there is a difference of electronegativities between the atoms. It is also defined as the bond which is formed due to the unequal sharing of electrons between the atoms.  An electronegative atom is the one which attracts the shared pair of electron towards itself.

Ionic bond is formed when there is complete transfer of electron from one atom to another atom.

In water, there is sharing of electrons between hydrogen and oxygen where the electron pair is more attracted to the more electronegative oxygen atom and thus acquire a partial negative charge. The hydrogen will acquire a partial positive charge.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

ur answer is e & d

explanation: