Hi there!
I'm not too sure how to save the victim's life in a situation like this, but you SHOULD NOT give oxygen to a victim who has suffered from an explosion at close-range, while under positive pressure.
Answer:
The correct answer is option 3. a nucleus.
Explanation:
The first genetic material present in the early organisms were RNA which was present in the microscopic organisms back then 3.5 billion years ago which means it is normal to have RNA in such microfossils chemical analysis.
Since, the nucleus was not present in early life forms of prokaryotes like bacteria. so, it is unusual to find nucleus in the fossils of stromatolite rocks.
Thus, option III is the correct answer.
It is known as stimulus or the plural form stimuli. It can be external or internal.
