The scientists that won the Nobel Prize for publishing the first description of the structure of DNA were Watson & Crick.
Mainly because our lungs are made to intake air, and if we where to inhale water we would drown. oxygen can only be obtained from the air because our lungs would be able to expell the excess stuff from air easier than in water. hope i helped.
here are the structures i hope it helps
Answer:
primary, secondary, tertiary, and quaternary.
Mars
is the answer
im sure
Answer: Pollution, climate change, habitat loss, or invasive species