Answer:
I could be wrong, but I believe the answer is D) State and National parks
Hydrogen bonds.
The nucleotides in a base pair are complementary which means their shape allows them to bond together with hydrogen bonds. The A-T pair forms two hydrogen bonds. The C-G pair forms three. The hydrogen bonding between complementary bases holds the two strands of DNA together
Answer:
Fuel cell electric vehicles are powered by hydrogen
they only emit water vapor and warm air
Explanation:
Through the carbon cycle and ocean acidification