Answer:
3. GEL ELECTROPHORESIS
Explanation:
I WAS JUST TAKING A TEST WITH THIS QUESTION AND I CHOSE 4. ELECTRON MICROSCOPE BECAUSE gabrielboemer answered this question. That is incorrect! Trust me
Answer: C. Multi-celled eukaryotic organism began to diversify
Explanation:
The Proterozoic is an eon. There were multiple organisms that appeared in this eon. They perform the process of photosynthesis which resulted in gradual pilling up of oxygen into the atmosphere, thus changing the composition of the atmosphere and setting up for future organism.
Answer:
Elmira
Explanation:
cause the altitude of Polaris is 42 and alt of Polaris equals latitude of observer, and only Elmira is near the 42 degree latitude line.
There are three significant figures in this number!