___ bonds form between complimentary base pairs and ___ bonds form between the sugar and the phosphate molecules in the "backbone" of the DNA molecule.

A. covalent; hydrogen
B. hydrogen; ionic
C. hydrogen; covalent
D. ionic; covalent

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

What best explains whether bromine (br) or neon (ne) is more likely to form a covalent bond? bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons. neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron. neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.

What determines whether a particular cell is able to respond to a hormone?