<u>The answer to your question is going to be option "D."</u>
Oxygen levels first rose in the atmosphere because of (the last option, or "D') cyanobacteria. Cyanobacteria is a type of bacteria that can create toxins that are very dangerous to both humans and animals.
I hope this helps! :)
Answer:
A <u>scientific model</u> is a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes. Scientists seek to identify and understand patterns in our world by drawing on their scientific knowledge to offer explanations that enable the patterns to be predicted.
Idk<span>Around what year can Carbon-14 dating be used up to and why?</span>
Answer:
Stays the same.
Explanation:
The temperature does not change just because something melts.
Answer:
Explanation:
Newton's second law of motion is F = ma, or force is equal to mass times acceleration.
( can u give me brainlist plz)