Answer:
When winter arrives availability of food and water decreases so birds travel to warmer places to escape the cold also to survive over there
Explanation:
hope it helps
Answer:
Explanation:
distribution and population density in the research region of east China. ... Aerosol is defined as the scattered and small solid or liquid particles ...
Answer:
(C RNA can catalyze biological reactions and most likely appeared before DNA.
Explanation:
From my knowledge, I believe...
RNA most likely appeared before DNA and is known to be an unstable molecule.
<em>kiniwih426</em>
I think observation and measurable.